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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Policy [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property and equipment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment of long-lived assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Asset, Excluding Intangible Asset and Goodwill, Impairment and Disposal [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeasesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leases</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeasesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Leases [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative financial instruments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivatives, Policy [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segment reporting</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, Policy [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounting standards not yet adopted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update and Change in Accounting Principle [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingPoliciesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary of Significant Accounting Policies [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Earnout Liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Loss Per Share of Common Stock [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Loss per Common Share:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Diluted Net Income (Loss) Per Share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reverse stock splits</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders' Equity, Policy [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Change in the Fair Value Measurement Using Significant Inputs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ScheduleOfChangeInTheFairValueMeasurementUsingSignificantInputsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Change in the Fair Value Measurement Using Significant Inputs [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SummaryOfSignificantAccountingPoliciesScheduleOfFairValueOfTheCompanysEarnoutLiabilityAndPreferredStockWarrantLiabilityTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary of Significant Accounting Policies Schedule of Fair Value of The Company's Earnout Liability and Preferred Stock Warrant Liability [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Change in the Fair Value Measurement Using Significant Inputs [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_EarnoutLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Earnout liability, beginning</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_EarnoutLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Earnout liability, ending</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_EarnoutLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Earnout liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_EarnoutLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnout Liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_EarnoutLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of earnout liability.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at beginning</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at ending</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">February 2025 Common Warrants Issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants and Rights Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConvertibleDebtWithConversionFeatureAmountAllocatedToConversionFeature_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Initial fair value of conversion features allocated to debt discount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConvertibleDebtWithConversionFeatureAmountAllocatedToConversionFeature_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible debt with conversion feature amount allocated to conversion feature</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConvertibleDebtWithConversionFeatureAmountAllocatedToConversionFeature_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of convertible debt with conversion feature amount allocated to conversion feature.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DerivativeInstrumentGainLossOnSettlementOrConversion_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Initial fair value of conversion features allocated to initial derivative expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DerivativeInstrumentGainLossOnSettlementOrConversion_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative instrument gain loss on settlement or conversion</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DerivativeInstrumentGainLossOnSettlementOrConversion_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of derivative instrument gain loss on settlement or conversion.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DerecognizedUponExtinguishmentOfDebtIncludedInGainOnDebtExtinguishment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derecognized upon extinguishment of debt included in gain on debt extinguishment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DerecognizedUponExtinguishmentOfDebtIncludedInGainOnDebtExtinguishment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derecognized upon extinguishment of debt included in gain on debt extinguishment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DerecognizedUponExtinguishmentOfDebtIncludedInGainOnDebtExtinguishment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of derecognized upon extinguishment of debt included in gain on debt extinguishment.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative Liabilities:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Liability [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_EarnoutsLiabilityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Earnout Liability:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_EarnoutsLiabilityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnouts Liability [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainsOnRevaluationOfEarnoutLiability_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gain on revaluation of earnout liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainsOnRevaluationOfEarnoutLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gains On Revaluation Of Earnout Liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainsOnRevaluationOfEarnoutLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gain on revaluation of earnout liability.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAuctionMarketPreferredSecuritiesByStockSeriesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Preferred Stock Liabilities Activity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAuctionMarketPreferredSecuritiesByStockSeriesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Auction Market Preferred Securities by Stock Series [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ScheduleOfPreferredStockLiabilitiesActivityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Preferred Stock Liabilities Activity [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SummaryOfSignificantAccountingPolicies-ScheduleOfPreferredStockLiabilitiesActivityTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary of Significant Accounting Policies - Schedule of Preferred Stock Liabilities Activity [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingenciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingencies [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingenciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingencies [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfStockDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForLegalSettlements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unpaid fees for legal services</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForLegalSettlements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments for Legal Settlements</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeriesDPreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series D Preferred Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeriesDPreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Series D Preferred Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeriesDPreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series D</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeriesEPreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series E Preferred Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeriesEPreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series E</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeriesEPreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Series E Preferred Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FebruaryTwoThousandTwentySixNoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">February Two Thousand Twenty Six Note [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_MarchTwoThousandTwentySixNoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">March Two Thousand Twenty Six Note [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AprilTwoThousandTwentySixNoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">April Two Thousand Twenty Six Note [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SecondAprilNoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Second April Note [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_MayTwoThousandTwentySixNoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">May Two Thousand Twenty Six Note [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_JuneTwoThousandTwentySixAdvanceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">June Two Thousand Twenty Six Advance [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_JulyTwoThousandTwentySixNoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">July Two Thousand Twenty Six Note [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AugustTwoThousandTwentySixAdvanceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">August Two Thousand Twenty Six Advance [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Convertible Notes [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Original Holder</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Description</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentIssuanceDate1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issue Date</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentIssuanceDate1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Issuance Date</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maturity date</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Maturity Date</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFeeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Fee Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/positiveLabel">Principal</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principal amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Face Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MortgageNotesPayableDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">NOTES PAYABLE</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MortgageNotesPayableDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mortgage Notes Payable Disclosure [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Notes Payable, Net</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Debt [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate notes amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Notes payable, net</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Notes payable, net</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable, Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShortTermDebtTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Short-Term Debt [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Name [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermDebtLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Short-Term Debt [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_KeystoneELOCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Keystone ELOC [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_KeystoneELOCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Keystone ELOCMember</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SRXGlobalIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SRX Global Inc [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentIssuedPrincipal_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principal amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentIssuedPrincipal_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Principal balance</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentIssuedPrincipal_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Issued, Principal</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentIncreaseAccruedInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued and unpaid interest</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentIncreaseAccruedInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Increase, Accrued Interest</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtAverageAmountOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding debt</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtAverageAmountOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Average Amount Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SRXNotesPayableMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SRX Notes Payable [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AmountReceivedUnderNotes_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AmountReceivedUnderNotes_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amount Received Under Notes</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AmountReceivedUnderNotes_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of amount received under notes.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LegalFees_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Legal expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LegalFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consulting fee (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LegalFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legal Fees</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Interest per annum</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of convertible notes</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Interest Rate, Stated Percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GoodwinProcterLLPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Goodwin Procter LLP [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Monthly installments payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Notes Payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementScenarioAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Scenario [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioUnspecifiedDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Scenario [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioForecastMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Forecast [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNotesPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Notes Payable, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNotesPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Notes Payable, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_OtherNotesPayableMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Notes Payable [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of debt discount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amortization of debt discounts</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amortization of Debt Discount (Premium)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtWeightedAverageInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Weighted average interest rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtWeightedAverageInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lowest volume weighted average price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtWeightedAverageInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt, Weighted Average Interest Rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayableCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Notes Payable, Net [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Notes payable, net &#8211; long-term</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable, Noncurrent, Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: unamortized debt discount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate original issue discount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Unamortized Discount, Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfConversionPriceEqualAverage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of conversion price equal average</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfConversionPriceEqualAverage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Conversion Price Equal Average</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfConversionPriceEqualAverage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of conversion price equal average.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfBeneficialOwnershipLimitation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of beneficial ownership limitation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfBeneficialOwnershipLimitation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Beneficial Ownership Limitation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfBeneficialOwnershipLimitation_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of  beneficial ownership limitation.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_InitialDerivativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Initial derivative expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_InitialDerivativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Initial Derivative Expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_InitialDerivativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of initial derivative expenses.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongtermConvertibleDebtCurrentAndNoncurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Notes Payable [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Fair Value of the Derivative Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesCurrentAndNoncurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Liabilities [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebtAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Gain Recognized On Gain of Extinguishment Debt [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountCurrent_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: unamortized debt discount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Unamortized Discount, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleDebtCurrent_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: current portion of convertible notes payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleDebtCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Debt, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Accrued Liabilities [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseDescriptionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseDescriptionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Description [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease cost</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Cost</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable operating lease cost</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Lease, Cost</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SubleaseIncomeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sublease income received</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SubleaseIncomeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sublease Income Received</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SubleaseIncomeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sublease income received.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total lease cost</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease, Cost</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Right-of-use asset, net</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease right-of-use assets, net</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Right-of-Use Asset</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Operating lease liability, current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease liability, non-current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Operating lease liability, net of current portion</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability, Noncurrent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: imputed interest</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, Undiscounted Excess Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total lease liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total operating lease liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SummaryofSignificantAccountingPoliciesDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary of Significant Accounting Policies (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeriesEConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Series E Convertible Preferred Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeriesEConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series E Convertible Preferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeriesEConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series EConvertible Preferred Stock Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeriesDConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Series D Convertible Preferred Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeriesDConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series D Convertible Preferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeriesDConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series DConvertible Preferred Stock Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeriesAPreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Series A Preferred Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeriesAPreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series A</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeriesAPreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series A Preferred Stock [Member] [Standard Label]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related and Nonrelated Parties [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related and Nonrelated Parties [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_MonteCarloMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Monte-Carlo [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_MonteCarloMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Monte Carlo Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingEstimateLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary of Significant Accounting Policies [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Cash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Cash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WorkingCapitalDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Working capital deficit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WorkingCapitalDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Working Capital Deficit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WorkingCapitalDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of working capital deficit.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated deficit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings (Accumulated Deficit)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stockholders&#8217; deficit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total stockholders&#8217; deficit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Parent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeriesACertificateOfDesignationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series A Preferred Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeriesACertificateOfDesignationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series ACertificate Of Designations Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Accrued Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Accrued Liabilities [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeasesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Leases [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseCostTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Lease Costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseCostTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease, Cost [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Maturity Lease Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsNoteDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Outstanding Warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ScheduleOfEarnoutLiabilityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Earnout Liability Abstract</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SummaryofSignificantAccountingPoliciesScheduleofEarnoutLiabilityDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary of Significant Accounting Policies - Schedule of Earnout Liability (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 1 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 1 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 2 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 2 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Security, Excluded EPS Calculation [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities, Name [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConversionOfConvertiblePreferredStockIssuedAndOutstandingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion of convertible preferred stock issued and outstanding [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConversionOfConvertiblePreferredStockIssuedAndOutstandingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conversion Of Convertible Preferred Stock Issued And Outstanding Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ExerciseOfCommonWarrantsIntoCommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise of warrants for common stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ExerciseOfCommonWarrantsIntoCommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exercise Of Common Warrants Into Common Stock Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MachineryAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Laboratory equipment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MachineryAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Machinery and Equipment, Gross</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CapitalizedComputerSoftwareGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Computers</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CapitalizedComputerSoftwareGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capitalized Cost, Software to be Sold, Leased, or Marketed, before Accumulated Amortization</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FurnitureAndFixturesGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Furniture</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FurnitureAndFixturesGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Furniture and Fixtures, Gross</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total cost</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: accumulated depreciation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Property and equipment, net</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property and equipment, net</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AggregateProceeds_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate proceeds (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AggregateProceeds_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Aggregate Proceeds</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AggregateProceeds_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Aggregate proceeds.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConversionOfStockSharesIssued1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion of shares (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConversionOfStockSharesIssued1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conversion of Stock, Shares Issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainOnRevaluationOfPreferredStockLiabilities_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Gain on reevaluation of preferred stock liabilities (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainOnRevaluationOfPreferredStockLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain on revaluation of preferred stock liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainOnRevaluationOfPreferredStockLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain On Revaluation Of Preferred Stock Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainOnRevaluationOfPreferredStockLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of gain on revaluation of preferred stock liabilities.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoninterestExpenseOfferingCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Offering costs (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoninterestExpenseOfferingCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Offering Cost, Expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Exercise price per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Exercise Price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Exercise Price of Warrants or Rights</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfGrossProceedsInOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross proceeds percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfGrossProceedsInOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Gross Proceeds In Offering</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfGrossProceedsInOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of gross proceeds in offering.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Out-of-pocket expenses (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NonAccountableExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-accountable expenses (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NonAccountableExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non Accountable Expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NonAccountableExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of non-accountable expenses.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockConsiderationReceivedOnTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Sale of common stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockConsiderationReceivedOnTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net proceeds (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockConsiderationReceivedOnTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock, Consideration Received on Transaction</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentRiskAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Instrument [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeContractTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Contract [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ELOCFundingsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">ELOC Fundings [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConvertibleNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Notes [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LettersOfCreditOutstandingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Letter of credit demanding amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LettersOfCreditOutstandingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Letters of Credit Outstanding, Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MandatorilyRedeemablePreferredStockFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock liabilities fair value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MandatorilyRedeemablePreferredStockFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mandatorily Redeemable Preferred Stock, Fair Value Disclosure</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentSoldNotYetPurchasedBalancePrincipalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate principal amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentSoldNotYetPurchasedBalancePrincipalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Security Sold Short, Principal Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SRXMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SRX [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeniorSecuredPromissoryNoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Senior Secured Promissory Note [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_KeystoneCapitalPartnersLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Keystone Capital Partners, LLC [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepositLiabilitiesAccruedInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued and unpaid interest</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepositLiabilitiesAccruedInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deposit Liabilities, Accrued Interest</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value of preferred stock liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2027</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year One</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2028</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year Two</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_OfficeAndLaboratorySpace_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Office and laboratory space</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_OfficeAndLaboratorySpace_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Office and laboratory space</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_OfficeAndLaboratorySpace_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The office and laboratory space.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeaseDescriptionTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Lease, Description [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Base rent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments for Rent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeaseDescriptionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Lease, Description [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_LetterOfCreditCollateralizedByCashDeposit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash deposit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_LetterOfCreditCollateralizedByCashDeposit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Letter of Credit Collateralized by Cash Deposit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_LetterOfCreditCollateralizedByCashDeposit_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of cash deposit.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubordinatedBorrowingInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incremental borrowing rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubordinatedBorrowingInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subordinated Borrowing, Interest Rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_LetterOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Letter of Credit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_LetterOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of letter of credit.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainOnRevaluationOfPreferredStockLiabilitiesReversedForDilutedEPS_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reversal gain on revaluation of preferred stock liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainOnRevaluationOfPreferredStockLiabilitiesReversedForDilutedEPS_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain On Revaluation Of Preferred Stock Liabilities Reversed For Diluted EPS</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainOnRevaluationOfPreferredStockLiabilitiesReversedForDilutedEPS_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gain on revaluation of preferred stock liabilities reversed for diluted eps.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Diluted earnings per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Diluted (in Dollars per share)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/definitionGuidance">Net income per common share &#8211; diluted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Diluted, Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Dilutive net income per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basic (in Dollars per share)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/disclosureGuidance">Net income per common share &#8211; basic</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Basic, Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_LeaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease agreement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_LeaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease agreement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_LeaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The duration of lease agreement.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Activity in the Derivative Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Activity [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfExtinguishmentOfDebtTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Gain Recognized On Gain of Extinguishment Debt</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfExtinguishmentOfDebtTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Extinguishment of Debt [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfPurchasePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of purchase price of principal amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfPurchasePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Purchase Price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfPurchasePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of purchase price.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherBorrowings_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Permitted borrowings</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherBorrowings_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Borrowings</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentCollateralAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum loan amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentCollateralAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Collateral Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion feature derivatives</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Convertible, Beneficial Conversion Feature</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DebtDiscountMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Discount [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DerivativeExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Expense [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeGainLossOnDerivativeNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recognized net gain loss on derivative liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeGainLossOnDerivativeNet_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Inducement expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeGainLossOnDerivativeNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative, Gain (Loss) on Derivative, Net, Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConvertibleNotesPayableDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Notes Payable (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConvertiblePromissoryNoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible Promissory Note [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConvertiblePromissoryNoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Promissory Note Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConvertibleNotesPayableDetailsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Notes Payable [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible promissory note</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Notes Payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleConversionPrice1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion price (in Dollars per share)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleConversionPrice1_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Conversion price per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleConversionPrice1_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Conversion price per share (in Dollars per share)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleConversionPrice1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Convertible, Conversion Price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseTermOfContract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease with contractual term</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseTermOfContract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Term of Contract</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubleaseIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sublease Income</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubleaseIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sublease Income</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecurityDeposit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security deposit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecurityDeposit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Security Deposit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockholdersDeficitDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders&#8217; Deficit (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockConvertibleConversionPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Conversion price per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockConvertibleConversionPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock conversion price (in Dollars per share)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockConvertibleConversionPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Convertible, Conversion Price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WeightedAveragePricePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average price percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WeightedAveragePricePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Price Percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WeightedAveragePricePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of weighted average price.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PremiumPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Premium percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PremiumPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Premium Percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PremiumPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Premium percentage.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_RedemptionPremiumPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redemption premium percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_RedemptionPremiumPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Redemption Premium Percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_RedemptionPremiumPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Redemption premium percentage.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Number of warrants to purchase shares (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Pre-Funded Warrants Purchased (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Number of Securities Called by Warrants or Rights</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NumberOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of shares (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NumberOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NumberOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of shares.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DeemedDividend_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deemed dividend (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DeemedDividend_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deemed Dividend</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DeemedDividend_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of deemed dividend.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockConvertibleConversionPriceIncrease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock share price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockConvertibleConversionPriceIncrease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Convertible, Conversion Price, Increase</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConversionOfStockSharesConverted1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Converted shares (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConversionOfStockSharesConverted1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conversion of Stock, Shares Converted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockbasedInducementExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based inducement expense (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockbasedInducementExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockbased Inducement Expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockbasedInducementExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock-based inducement expense.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AggregateOwedSharesOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate owed shares of common stock (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AggregateOwedSharesOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Aggregate Owed Shares Of Common Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AggregateOwedSharesOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Aggregate owed shares of common stock.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PayablePreferredStockRedeemed_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redemption amount (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PayablePreferredStockRedeemed_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payable, Preferred Stock Redeemed</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FloorPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Floor price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FloorPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Floor Price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FloorPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Floor price.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PreferredStockWereConvertedIntoSharesOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred Stock were converted into shares of Common Stock (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PreferredStockWereConvertedIntoSharesOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock Were Converted Into Shares Of Common Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PreferredStockWereConvertedIntoSharesOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Preferred stock was converted into shares of common stock.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_EstablishingAndDesignatingShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Establishing and designating shares (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_EstablishingAndDesignatingShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Establishing And Designating Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_EstablishingAndDesignatingShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Establishing and designating shares.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FloorPriceValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Floor price value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FloorPriceValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Floor Price Value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FloorPriceValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Floor price value.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accrued Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInInsuranceLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Insurance payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInInsuranceLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Insurance Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Operating Lease Liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash used in operating activities</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Operating Activity, Including Discontinued Operation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CASH FLOWS FROM FINANCING ACTIVITIES:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">SUPPLEMENTAL CASH FLOW INFORMATION:</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">The following table provides a reconciliation of cash and cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the same such amounts shown in the consolidated statements of cash flows:</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash, restricted cash and cash equivalents per consolidated statements of cash flows</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Cash, restricted cash and cash equivalents at beginning of period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Cash, restricted cash and cash equivalents at end of period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Significant Accounting Policies [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FebruaryTwoThousandTwentyFiveCommonWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">February 2025 Common Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FebruaryTwoThousandTwentyFiveCommonWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">February Two Thousand Twenty Five Common Warrants Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risk-free interest rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected life (in years)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected dividend yield</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected volatility</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ScheduleOfRelatedPartyTransactionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Related Party Transaction Abstract</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AtwoodEdminsterTrustDtd422000AndGVNLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Atwood-Edminster Trust dtd 4-2-2000 and GVN, LLC [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AtwoodEdminsterTrustDtd422000AndGVNLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Atwood Edminster Trust Dtd422000 And GVNLLCMember</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Related Party Transaction [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related-Party Transactions [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total Purchase Price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction, Purchases from Related Party</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common stock, shares issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares issued (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Issued shares (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common stock issued (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Preferred stock, shares issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, shares issued (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Shares Issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SubsequentEventsDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events (Details) [Table]</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Components [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Component [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Period Focus</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Tax Identification Number</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Insurance payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquityCarryingAmountAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock liabilities - Series E convertible preferred stock, $0.0001 par value; 10,000 shares authorized; 3,552 shares issued and outstanding at September 30, 2026; liquidation preference of $4,440,000 at September 30, 2026</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquityCarryingAmountAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Preferred stock liabilities balance, ending</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquityCarryingAmountAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity, Carrying Amount, Attributable to Parent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_EarnoutLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Earnout liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_EarnoutLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnout Liability Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_EarnoutLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the amount of earnout liability.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DividendsPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deemed dividend &#8211; common stock liability, 692 shares</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities and stockholders&#8217; deficit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities and Equity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Table]</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquityParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity, Par or Stated Value Per Share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquitySharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock liabilities, shares authorized (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquitySharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity, Shares Authorized</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueCommonStockOnConversionOfSeriesEPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of shares of Common Stock on conversion of Series E Preferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueCommonStockOnConversionOfSeriesEPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Common Stock On Conversion Of Series EPreferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueCommonStockOnConversionOfSeriesEPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Value of shares of stock issued attributable to transactions classified as issuance of shares of common stock on conversion of series E preferred stock.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesCommonStockOnConversionOfSeriesEPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of shares of Common Stock on conversion of Series E Preferred Stock (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesCommonStockOnConversionOfSeriesEPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Common Stock On Conversion Of Series EPreferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesCommonStockOnConversionOfSeriesEPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of shares of stock issued attributable to transactions classified as common stock on conversion of series E preferred stock.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise of pre-funded warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, Stock Options Exercised</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise of pre-funded warrants (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Fair value of the unvested stock options amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of shares of Common Stock upon conversion of Series C Preferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, Conversion of Units</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of shares of Common Stock upon conversion of Series C Preferred Stock (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Conversion of Units</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesOther_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchases of shares of Common Stock under Keystone ELOC (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesOther_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares of preferred stock (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesOther_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Other</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WriteOffOfSubscriptionReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collection of stock subscriptions receivable related to prior Keystone ELOC purchases</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WriteOffOfSubscriptionReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Write Off Of Subscription Receivable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WriteOffOfSubscriptionReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Note received instead of cash as contribution to equity. The transaction may be a sale of capital stock or a contribution to paid-in capital.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueCommonStockUponConversionOfSeriesAPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of shares of Common Stock upon conversion of Series A Preferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueCommonStockUponConversionOfSeriesAPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Common Stock Upon Conversion Of Series APreferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueCommonStockUponConversionOfSeriesAPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Value of shares of stock issued attributable to transactions classified as common stock upon conversion of series A preferred stock.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesCommonStockUponConversionOfSeriesAPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of shares of Common Stock upon conversion of Series A Preferred Stock (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesCommonStockUponConversionOfSeriesAPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Common Stock Upon Conversion Of Series APreferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesCommonStockUponConversionOfSeriesAPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of shares of stock issued attributable to transactions classified as common stock upon conversion of series A preferred stock.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueIssuanceOfSharesOfCommonStockOnConversionOfSeriesDPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of shares of Common Stock upon conversion of Series B Preferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueIssuanceOfSharesOfCommonStockOnConversionOfSeriesDPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Issuance Of Shares Of Common Stock On Conversion Of Series DPreferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueIssuanceOfSharesOfCommonStockOnConversionOfSeriesDPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance of shares of Common Stock upon conversion of Series D Preferred Stock.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Reclassification of fair value of preferred stock to preferred stock liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments to Additional Paid in Capital, Warrant Issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net loss</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Income (Loss)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares, Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net proceeds (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Preferred Stock and Preference Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesPurchaseOfAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares purchased (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesPurchaseOfAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Purchase of Assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of shares sold (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Sold issued shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock, Number of Shares Issued in Transaction</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockIncludingAdditionalPaidInCapitalNetOfDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred Stock, Including Additional Paid in Capital, Net of Discount (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockIncludingAdditionalPaidInCapitalNetOfDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Including Additional Paid in Capital, Net of Discount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Exercisable price per share (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding Shares, Options exercisable balance</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value per share (in Dollars per share)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodShareEmployeeStockPurchasePlans_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employees options to purchase (in Dollars per share)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodShareEmployeeStockPurchasePlans_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Share Employee Stock Purchase Plans</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodShareEmployeeStockPurchasePlans_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of shares issued during the period as a result of an employee stock purchase plan.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredCompensationEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortized over the vesting period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredCompensationEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Compensation Equity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock based compensation expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanContributionsByEmployer_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued contributions</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanContributionsByEmployer_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan, Plan Assets, Contributions by Employer</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_RelatedPartyTransactionsDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related-Party Transactions (Details) [Table]</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleNotesPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Notes payable, net</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleNotesPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Notes Payable, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and contingencies (Note 14)</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Preferred stock, issued stated value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Value, Issued</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Value, Issued</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of Common Stock under Keystone ELOC</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of Common Stock under Keystone ELOC (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Aggregate share issued and sold</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares of common stock (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, New Issues</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of shares of Common Stock on conversion of Series D Preferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, Conversion of Convertible Securities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of shares of Common Stock on conversion of Series D Preferred Stock (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares converted (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Conversion of Convertible Securities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueSeriesDPreferredStockForCashAndEquitySecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of Series D Preferred Stock for cash and equity securities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueSeriesDPreferredStockForCashAndEquitySecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Series DPreferred Stock For Cash And Equity Securities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueSeriesDPreferredStockForCashAndEquitySecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Value of shares of stock issued attributable to transactions classified as preferred stock for cash and equity securities.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesSeriesDPreferredStockForCashAndEquitySecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of Series D Preferred Stock for cash and equity securities (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesSeriesDPreferredStockForCashAndEquitySecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Series DPreferred Stock For Cash And Equity Securities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesSeriesDPreferredStockForCashAndEquitySecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of shares of stock issued attributable to transactions classified as series D preferred stock for cash and equity securities.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based inducement expense related to conversion of Series C Preferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition_lbl" xlink:role="http://www.xbrl.org/2003/role/label">APIC, Share-Based Payment Arrangement, Option, Increase for Cost Recognition</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockAndWarrantsIssuedDuringPeriodValuePreferredStockAndWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of shares of Series A Preferred Stock upon exercise of Series A Preferred Warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockAndWarrantsIssuedDuringPeriodValuePreferredStockAndWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesIssuanceOfSharesOfSeriesAPreferredStockOnExerciseOfSeriesAPreferredWarrant_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of shares of Series A Preferred Stock upon exercise of Series A Preferred Warrants (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesIssuanceOfSharesOfSeriesAPreferredStockOnExerciseOfSeriesAPreferredWarrant_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Issuance Of Shares Of Series APreferred Stock On Exercise Of Series APreferred Warrant</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesIssuanceOfSharesOfSeriesAPreferredStockOnExerciseOfSeriesAPreferredWarrant_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance of shares of series A preferred stock on exercise of series A preferred warrants.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueSaleOfCommonStockAndWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of common stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueSaleOfCommonStockAndWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Sale Of Common Stock And Warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueSaleOfCommonStockAndWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Value of stock issued under sale of common stock and warrants.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesSaleOfCommonStockAndWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of common stock (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesSaleOfCommonStockAndWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Sale Of Common Stock And Warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesSaleOfCommonStockAndWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of shares under sale of common stock and warrants.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueSaleOfPrefundedWarrantsNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of pre-funded warrants, net of issuance costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueSaleOfPrefundedWarrantsNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Sale Of Prefunded Warrants Net Of Issuance Costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueSaleOfPrefundedWarrantsNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Value of stock issued under sale of pre-funded warrants, net of issuance costs.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueExerciseOfPrefundedWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise of pre-funded warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueExerciseOfPrefundedWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Exercise Of Prefunded Warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueExerciseOfPrefundedWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Value of stock issued under exercise of pre-funded warrants.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesExerciseOfPrefundedWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise of pre-funded warrants (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesExerciseOfPrefundedWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Exercise Of Prefunded Warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesExerciseOfPrefundedWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of shares under exercise of pre-funded warrants.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueOther_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchases of shares of Common Stock under Keystone ELOC</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueOther_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, Other</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesIssuanceOfSharesOfCommonStockUponConversionOfSeriesDPreferredStockinShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of shares of Common Stock upon conversion of Series B Preferred Stock (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesIssuanceOfSharesOfCommonStockUponConversionOfSeriesDPreferredStockinShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Issuance Of Shares Of Common Stock Upon Conversion Of Series DPreferred Stockin Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSharesIssuanceOfSharesOfCommonStockUponConversionOfSeriesDPreferredStockinShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance of shares of common stock upon conversion of series D preferred stock.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRedeemedOrCalledDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Redemption of Series C Preferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRedeemedOrCalledDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash redemption (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRedeemedOrCalledDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Redeemed or Called During Period, Value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRedeemedOrCalledDuringPeriodShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redemption of Series C Preferred Stock (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRedeemedOrCalledDuringPeriodShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Redeemed or Called During Period, Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueStockbasedInducementExpenseRelatedToConversionOfSeriesCPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based inducement expense related to conversion of Series A Preferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueStockbasedInducementExpenseRelatedToConversionOfSeriesCPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Stockbased Inducement Expense Related To Conversion Of Series CPreferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodValueStockbasedInducementExpenseRelatedToConversionOfSeriesCPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of stock-based inducement expense related to conversion of Series C preferred stock.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SaleOfPrefundedWarrantsNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of pre-funded warrants, net of issuance costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SaleOfPrefundedWarrantsNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Prefunded Warrants Net Of Issuance Costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SaleOfPrefundedWarrantsNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sale of pre-funded warrants, net of issuance costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromDebtNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net of issuance costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromDebtNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Debt, Net of Issuance Costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Cash Flows [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CASH FLOWS FROM OPERATING ACTIVITIES:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Transition Report</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trading Symbol</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Expenses:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Expenses [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and development</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research and Development Expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">General and administrative</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">General and Administrative Expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Operating Expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Loss from Operations</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Income (Loss)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Income (Expenses):</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nonoperating Income (Expense) [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">(Loss) gain on foreign currency</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss), Foreign Currency Transaction, before Tax</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DeemedDividendOnSeriesABAndCPreferredStock_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Deemed dividend on Series A, B, C, D and E Preferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DeemedDividendOnSeriesABAndCPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deemed Dividend On Series ABAnd CPreferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DeemedDividendOnSeriesABAndCPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deemed dividend on Series A, B and C preferred stock.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Dividends_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Deemed dividend related to Series C Common Warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Dividends_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dividends</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net loss attributable to common shareholders</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net income attributable to common shareholders</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss) Available to Common Stockholders, Basic</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeriesBPreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series B</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeriesBPreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Series B Preferred Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeriesBPreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series B Preferred Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeriesCPreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series C</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeriesCPreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Series C Preferred Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeriesCPreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series C Preferred Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of right-of-use operating lease asset</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Right-of-Use Asset, Periodic Reduction</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossUnrealized_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Foreign currency transaction (loss) gain included in other income (expenses)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossUnrealized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrealized Gain (Loss), Foreign Currency Transaction, before Tax</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDerivativeInstrumentsNetPretax_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Loss on initial and revaluation of derivative liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDerivativeInstrumentsNetPretax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Derivative Instruments, Net, Pretax</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainOnRevaluationOfEarnoutLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain on revaluation of earnout liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainOnRevaluationOfEarnoutLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain On Revaluation Of Earnout Liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainOnRevaluationOfEarnoutLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gain on revaluation of earnout liability.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ProceedsFromExerciseOfSeriesAPreferredWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from exercise of Series A Preferred warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ProceedsFromExerciseOfSeriesAPreferredWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Exercise Of Series APreferred Warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ProceedsFromExerciseOfSeriesAPreferredWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the amount of cash inflow of proceeds from exercise of Series A Preferred warrants.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromOtherShortTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from convertible notes payable, net</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromOtherShortTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Other Short-Term Debt</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfFairValueOfPreferredStockLiabilityToPaid-inCapitalUponConversion_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification of fair value of preferred stock liability to paid-in capital upon conversion</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfFairValueOfPreferredStockLiabilityToPaid-inCapitalUponConversion_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of increase (decrease) to additional paid in capital (APIC) resulting from changes in fair value of reclassification of fair value of preferred stock liability to paid-in capital upon conversion.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_IssuanceOfSeriesDPreferredSharesForCashNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of series D Preferred Stocks for cash, net of issuance costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_IssuanceOfSeriesDPreferredSharesForCashNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issuance of series D preferred shares for cash net of issuance costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_IssuanceOfSeriesDPreferredSharesForCashNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of issuance of preferred shares for cash net of issuance cost.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSeriesDPreferredStockInSharesSharesConversion_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of series D Preferred Stocks for cash, net of issuance costs (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSeriesDPreferredStockInSharesSharesConversion_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Series D Preferred Stock in Shares Shares Conversion</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StockIssuedDuringPeriodSeriesDPreferredStockInSharesSharesConversion_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of stock issued during period shares issuance of shares of common stock upon conversion of series d preferred stock in shares.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_IssuanceOfSharesOfCommonStockUponConversionOfSeriesDPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of shares of Common Stock upon conversion of Series D Preferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_IssuanceOfSharesOfCommonStockUponConversionOfSeriesDPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issuance of shares of Common Stock upon conversion of Series D Preferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_IssuanceOfSharesOfCommonStockUponConversionOfSeriesDPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of issuance of shares of common stock upon conversion of series d preferred stock.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_IssuanceOfSharesOfCommonSharesUponConversionOfSeriesDPreferredShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of shares of Common Stock upon conversion of Series D Preferred Stock (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_IssuanceOfSharesOfCommonSharesUponConversionOfSeriesDPreferredShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">issuance of shares of common Shares upon conversion of series d preferred Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_IssuanceOfSharesOfCommonSharesUponConversionOfSeriesDPreferredShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of issuance of shares of common Shares upon conversion of series d preferred Shares.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, shares outstanding (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Shares Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_TerminationFee_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Termination fee</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_TerminationFee_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Termination Fee</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_TerminationFee_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of termination fee.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReimbursementFromLimitedPartnershipInvestment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reimbursement of the buyers transaction expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReimbursementFromLimitedPartnershipInvestment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reimbursement from Limited Partnership Investment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AssumptionOfTheLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Buyer&#8217;s assumption liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AssumptionOfTheLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assumption of the Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AssumptionOfTheLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of buyers assumption of the liabilities.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_TerminationOfPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Termination of purchase agreement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_TerminationOfPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Termination of Purchase Agreement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_TerminationOfPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of termination of purchase agreement.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AdvancesFromConsolidatedNote_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amount of advances</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AdvancesFromConsolidatedNote_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Advances from Consolidated Note</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AdvancesFromConsolidatedNote_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of advances from consolidated note.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NetProceedsOfConsolidatedNotes_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Proceeds of Advances</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NetProceedsOfConsolidatedNotes_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Proceeds of Consolidated Notes</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NetProceedsOfConsolidatedNotes_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of net proceeds of consolidated notes.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AdjustmentsToAdditionalPaidInCapitalWriteOffOfSubscriptionReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Write off of subscription receivable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AdjustmentsToAdditionalPaidInCapitalWriteOffOfSubscriptionReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments to Additional Paid in Capital, Write off of Subscription Receivable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AdjustmentsToAdditionalPaidInCapitalWriteOffOfSubscriptionReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of increase (decrease) to additional paid in capital (APIC) resulting from changes in fair value of subscription receivable.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeStockOptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Stock Options [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vest and are exercisable term</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Schedule of Stock Option Activity [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfIncomeLocationBalanceAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Location, Statement of Income, Balance [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SRXCommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SRX common stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation, State or Country Code</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid expenses and other current assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Expense and Other Assets, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current liabilities:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Current [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockLiquidationPreferenceValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, liquidation preference</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockLiquidationPreferenceValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Liquidation Preference, Value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, par value (in Dollars per share)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Par or Stated Value Per Share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares authorized (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares Authorized</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares outstanding (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Statement [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DerivativeExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gain (loss) on initial and revaluation of derivative liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DerivativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DerivativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Derivative expense.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ChangeInFairValueOfPreferredStockLiabilities_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gain from reevaluation of preferred stock liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ChangeInFairValueOfPreferredStockLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change In Fair Value Of Preferred Stock Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ChangeInFairValueOfPreferredStockLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of change in fair value of preferred stock liabilities.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ChangeInFairValueOfEarnoutLiability_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Change in fair value of earnout liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ChangeInFairValueOfEarnoutLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change In Fair Value Of Earnout Liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ChangeInFairValueOfEarnoutLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the amount of change in fair value of earnout liability.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_InducementExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Stock-based inducement expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_InducementExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inducement Expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_InducementExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the amount of inducement expense.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeOther_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest income</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeOther_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Income, Other</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseNonoperating_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Interest expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseNonoperating_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense, Nonoperating</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Price per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance price per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued, Price Per Share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockConvertibleConversionPriceIncrease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion price per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockConvertibleConversionPriceIncrease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Convertible, Conversion Price, Increase</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockShareSubscriptions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Authorized and unissued preferred stock (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockShareSubscriptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Shares Subscribed but Unissued</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Interactive Data Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line One</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line Two</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, City or Town</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, State or Province</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Postal Zip Code</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableAccruedLiabilitiesAndOtherLiabilitiesDisclosureCurrentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ACCRUED LIABILITIES</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableAccruedLiabilitiesAndOtherLiabilitiesDisclosureCurrentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeasesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">LEASE</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeasesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Leases [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders&#8217; Deficit [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">STOCKHOLDERS&#8217; DEFICIT</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WarrantsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">WARRANTS</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WarrantsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Text Block</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WarrantsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The entire disclosure for warrants.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basis of presentation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Basis of Accounting, Policy [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GoingConcernPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Going Concern</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GoingConcernPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Going Concern Policy Text Block</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GoingConcernPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for going concern.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash, restricted cash, and cash equivalents</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskCreditRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration of credit risk</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskCreditRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk, Credit Risk, Policy [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_InvestorConcentrationsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investor concentrations</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_InvestorConcentrationsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investor Concentrations Policy Text Block</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_InvestorConcentrationsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for investor concentrations.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_Rule10b51ArrangementModifiedFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Rule 10b5-1 Arrangement Modified [Flag]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_Rule10b51ArrangementModifiedFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Rule10b51 Arrangement Modified Flag</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_Rule10b51ArrangementModifiedFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Rule 10b5-1 Arrangement Modified [Flag].</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NonRule10b51ArrangementModifiedFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non Rule 10b5-1 Arrangement Modified [Flag]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NonRule10b51ArrangementModifiedFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non Rule10b51 Arrangement Modified Flag</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NonRule10b51ArrangementModifiedFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Non Rule 10b5-1 Arrangement Modified [Flag].</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquityLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Preferred Stock Liabilities Activity [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquityLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfFairValueOfPreferredStockFromEquityToPreferredStockLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification of fair value of preferred stock from equity to preferred stock liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfFairValueOfPreferredStockFromEquityToPreferredStockLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reclassification of fair value of preferred stock from equity to preferred stock liabilities.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfFairValueOfPreferredStockFromPreferredStockLiabilitiesToEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification of fair value of preferred stock from preferred stock liabilities to equity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfFairValueOfPreferredStockFromPreferredStockLiabilitiesToEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reclassification of fair value of preferred stock from preferred stock liabilities to equity.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfSeriesEPreferredStockFairValueOfPreferredStockLiabilitiesToPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification of fair value of preferred stock liability to paid-in capital upon conversion</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfSeriesEPreferredStockFairValueOfPreferredStockLiabilitiesToPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification Of Series E Preferred Stock Fair Value Of Preferred Stock Liabilities To Paid</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfSeriesEPreferredStockFairValueOfPreferredStockLiabilitiesToPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reclassification of series e preferred stock fair value of preferred stock liabilities to paid.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Basic and Diluted Net Income Per Common Share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PrincipalAmountByOperatingSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principal amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PrincipalAmountByOperatingSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/label">PrincipalAmountByOperatingSubsidiary</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PrincipalAmountByOperatingSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of principal amount of operating subsidiary</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfManagementEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of management equity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfManagementEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">PercentageOfManagementEquity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfManagementEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of percentage of management Equity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasicOtherDisclosuresAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Basic, Other Disclosure [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Weighted average common shares outstanding &#8211; basic</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/positiveLabel">Weighted average common shares outstanding &#8211; basic</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basic (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Basic</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDilutedAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net income per common share - diluted:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDilutedAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Diluted [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net income attributable to common shareholders &#8211; basic</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss) Available to Common Stockholders, Diluted, Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainOnTheRevaluationOfPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Less: gain on the revaluation of preferred stock liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainOnTheRevaluationOfPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain on the revaluation of preferred stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainOnTheRevaluationOfPreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gain on the revaluation of preferred stock.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">dilutive shares related to</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Weighted average common shares outstanding &#8211; diluted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Diluted (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Diluted, Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEarningsPerShareDilutedByCommonClassTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Diluted, by Common Class, Including Two-Class Method [Table]</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ScheduleOfBasicAndDilutedNetIncomePerCommonShareLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Basic and Diluted Net Income Per Common Share [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasicAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net income per common share - basic:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasicAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Basic [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAttributableToParentDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Numerator for income per common share &#8211; diluted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAttributableToParentDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss) Attributable to Parent, Diluted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentDetailAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Activity in the Derivative Liabilities [Abstract]</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_InitialFairValueOfConversionFeaturesAllocatedToDebtDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Initial fair value of conversion features allocated to debt discount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_InitialFairValueOfConversionFeaturesAllocatedToDebtDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Initial fair value of conversion features allocated to debt discount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_InitialFairValueOfConversionFeaturesAllocatedToDebtDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Initial fair value of conversion features allocated to debt discount.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_InitialFairValueOfConversionFeaturesAllocatedToInitialDerivativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Initial fair value of conversion features allocated to initial derivative expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_InitialFairValueOfConversionFeaturesAllocatedToInitialDerivativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Initial fair value of conversion features allocated to initial derivative expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_InitialFairValueOfConversionFeaturesAllocatedToInitialDerivativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Initial fair value of conversion features allocated to initial derivative expense.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeGainOnDerivative_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain on revaluation of derivative liabilities</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebtBeforeWriteOffOfDeferredDebtIssuanceCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Extinguishment of Debt, before Debt Issuance Cost Writeoff</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ScheduleOfConvertibleNoteAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Convertible Notes [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: current portion of notes payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable, Current, Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConsolidatedNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consolidated Note with SRX</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConsolidatedNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidated Notes Payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConsolidatedNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of consolidated notes payable.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PromissoryNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Promissory note with Goodwin</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PromissoryNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Promissory Notes Payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PromissoryNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of promissory notes payable.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total note payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Notes Payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SettlementAgreementWithFormerLegalCounselMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Settlement Agreement with Former Legal Counsel [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SettlementAgreementWithFormerLegalCounselMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Settlement Agreement with Former Legal Counsel [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainOnRevaluationOfDerivativeLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain on revaluation of derivative liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainOnRevaluationOfDerivativeLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain on Revaluation of Derivative Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainOnRevaluationOfDerivativeLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of gain on revaluation of derivative liabilities.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NetProceeds_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Proceeds</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NetProceeds_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of net proceeds.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repayment of debt</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Debt</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remaining liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainOnChangeInFairValueRecognizedInConsolidatedStatementOfOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain on changes in fair value recognized in consolidated statement of operations</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainOnChangeInFairValueRecognizedInConsolidatedStatementOfOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of change in fair value of preferred stock liabilities.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NetProceed_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net proceed</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NetProceed_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Proceed</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NetProceed_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Net proceed.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FinancialStatementsIssuedPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial statements issued period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FinancialStatementsIssuedPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Statements Issued Period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FinancialStatementsIssuedPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Financial statements issued period.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Deposits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deposits</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Deposits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deposits</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLife_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated useful lives</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLife_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment, Useful Life</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_September2024PIPECommonWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">September 2024 PIPE Common Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_September2024PIPECommonWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">September2024 PIPECommon Warrants Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_KeystonePurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Keystone Purchase Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_KeystonePurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Keystone Purchase Agreement Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ArenaELOCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Arena ELOC [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ArenaELOCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Arena ELOCMember</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_JonesTradingInstitutionalServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">JonesTrading Institutional Services [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_JonesTradingInstitutionalServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Jones Trading Institutional Services Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeriesACertificateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series A Certificate [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeriesACertificateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series ACertificate Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PromissoryNoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Promissory Note [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PromissoryNoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Promissory Note Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConvertibleBridgeNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible Bridge Notes [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConvertibleBridgeNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Bridge Notes Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConversionPriceDebtMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion Price Debt [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConversionPriceDebtMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conversion Price Debt Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeriesEConversionPriceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series E Conversion Price [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeriesEConversionPriceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series EConversion Price Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FifthSecuritiesPurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fifth Securities Purchase Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FifthSecuritiesPurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fifth Securities Purchase Agreement Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FifthRegistrationRightsAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fifth Registration Rights Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FifthRegistrationRightsAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fifth Registration Rights Agreement Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NewKeystonePurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">New Keystone Purchase Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NewKeystonePurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">New Keystone Purchase Agreement Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_November2024KeystonePurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">November 2024 Keystone Purchase Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_November2024KeystonePurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">November2024 Keystone Purchase Agreement Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_November2025KeystonePurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">November 2025 Keystone Purchase Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_November2025KeystonePurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">November2025 Keystone Purchase Agreement Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SecuritiesPurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Securities Purchase Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SecuritiesPurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Securities Purchase Agreement Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConversionOfStockByUniqueDescriptionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Conversion Description [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PurchaseAgreementAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase agreement amount (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PurchaseAgreementAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Purchase Agreement Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PurchaseAgreementAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Purchase Agreement amount.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_CommonStockEarnoutShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Earnout common shares (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_CommonStockEarnoutShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Earnout Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_CommonStockEarnoutShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of earnout shares of common stock.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_EarnedEarnoutShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Earnout targe shares (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_EarnedEarnoutShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earned Earnout Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_EarnedEarnoutShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of earned earnout shares.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConversionOfStockAmountIssued1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConversionOfStockAmountIssued1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conversion of Stock, Amount Issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingCodmProfitLossMeasureHowUsedDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingCodmProfitLossMeasureHowUsedDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Depreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Depreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_interestBearingRateOfTheNote_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bears interest rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_interestBearingRateOfTheNote_lbl" xlink:role="http://www.xbrl.org/2003/role/label">interest Bearing Rate Of The Note</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_interestBearingRateOfTheNote_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">interest bearing rate of the note.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FebruaryTwoThousandTwentyFourPIPECommonWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">February 2024 PIPE Common Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FebruaryTwoThousandTwentyFourPIPECommonWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">February Two Thousand Twenty Four PIPECommon Warrants Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeriesAPreferredWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series A Preferred Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeriesAPreferredWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series APreferred Warrants Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre-Funded Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre Funded Warrants Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfStockLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders&#8217; Deficit [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NumberOfDesignatedShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Designated shares (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NumberOfDesignatedShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Designated Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NumberOfDesignatedShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of designated shares.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible note (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Debt</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Converted shares (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Preferred Stock, Shares Issued upon Conversion</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PremiumPenaltiesDue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Premium penalties due percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PremiumPenaltiesDue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Premium Penalties Due</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PremiumPenaltiesDue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of premium penalties due.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfPremiumShareDue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of premium share due</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfPremiumShareDue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Premium Share Due</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfPremiumShareDue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of premium share due.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalOther_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reduced additional paid-in capital (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalOther_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments to Additional Paid in Capital, Other</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DeemedDividendCommonStockLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deemed dividend common stock liability (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DeemedDividendCommonStockLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deemed Dividend Common Stock Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_DeemedDividendCommonStockLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deemed dividend common stock liability.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AccruedPenaltyPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued penalty payable (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AccruedPenaltyPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Penalty Payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AccruedPenaltyPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of accrued penalty payable.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net offering costs (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Of Issuance Costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of net of issuance costs.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NumberOfTradingDays_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trading days</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NumberOfTradingDays_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Trading Days</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_NumberOfTradingDays_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of trading days.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_MarketPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Market price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_MarketPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Market Price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_MarketPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Market price.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FairValueOfConsiderationReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of consideration received (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FairValueOfConsiderationReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Of Consideration Received</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FairValueOfConsiderationReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value of consideration received.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedDividendRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected dividend rate [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedDividendRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Expected Dividend Rate [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedTermMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected dividend rate [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedTermMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Expected Term [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputPriceVolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Volatility [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputPriceVolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Price Volatility [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risk-free interest rate [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Risk Free Interest Rate [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Fair Value of the Derivative Liabilities [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Inputs and Valuation Techniques [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilityMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of the derivative liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilityMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Liability, Measurement Input</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee payroll related liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee-related Liabilities, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AccruedFranchiseTaxesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued franchise taxes</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AccruedFranchiseTaxesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Franchise Taxes Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AccruedFranchiseTaxesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due franchise tax obligations.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PenaltyForLateFilingAndEffectiveness_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Penalty for late S-1 filing and effectiveness</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PenaltyForLateFilingAndEffectiveness_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Penalty For Late Filing And Effectiveness</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PenaltyForLateFilingAndEffectiveness_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of penalty for late filing and effectiveness.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued interest payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Payable, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedProfessionalFeesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued consulting and professional services</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedProfessionalFeesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Professional Fees, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total accrued liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Liabilities, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ScheduleOfLeaseCostsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Lease Costs Abstract</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average remaining lease term of operating leases (in years)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Weighted Average Remaining Lease Term</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average discount rate for operating leases</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Weighted Average Discount Rate, Percent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilitiesPaymentsDueRollingMaturityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Maturity Lease Liabilities [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2026 (remainder of year)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total lease payments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Stock Option Activity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Option, Activity [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Estimated the Fair Value of the Stock Options</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Related Party Transaction</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Related Party Transactions [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 3 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 3 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Earnout Liability [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValueOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock liabilities &#8211; Series E Preferred</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValueOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Preferred stock issued and outstanding (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValueOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Value, Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ScheduleOfDilutedNetLossPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Diluted Net Loss Per Share Abstract</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Diluted Net Income (Loss) Per Share [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Diluted Net Loss Per Share [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total antidilutive shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNetAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Property and Equipment, Net [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ScheduleOfFairValueOfTheDerivativeLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Fair Value Of The Derivative Liabilities Abstract</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Inputs and Valuation Techniques [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueOptionChangesInFairValueGainLoss1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueOptionChangesInFairValueGainLoss1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Option, Changes in Fair Value, Gain (Loss)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_KeystoneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Keystone [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayableFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recorded fair value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayableFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable, Fair Value Disclosure</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued interest</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Accrued Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FairValueOfEmbeddedConversionFeatureDerivatives_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of embedded conversion feature derivatives</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FairValueOfEmbeddedConversionFeatureDerivatives_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair value of embedded conversion feature derivatives</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FairValueOfEmbeddedConversionFeatureDerivatives_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value of embedded conversion feature derivatives.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ExtinguishmentOfDebtAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Extinguishment of Debt, Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ExtinguishmentOfDebtGainLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net carrying amount of extinguished debt</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ExtinguishmentOfDebtGainLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Extinguishment of Debt, Gain (Loss), Net of Tax</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeriesBConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series B Convertible Preferred Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AdjustmentPriceOfConvertibleStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustment price of convertible stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AdjustmentPriceOfConvertibleStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustment Price of Convertible Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AdjustmentPriceOfConvertibleStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of adjustment price of convertible stock.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConversionRatiosMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion Ratios [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConversionRatiosMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conversion Ratios [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_July2025KeystonePurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">July 2025 Keystone Purchase Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_July2025KeystonePurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">July 2025 Keystone Purchase Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FairValueOfTheConversionFeatureDerivative_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of the conversion feature derivatives</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FairValueOfTheConversionFeatureDerivative_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value of the Conversion Feature Derivative</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FairValueOfTheConversionFeatureDerivative_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value of the conversion feature derivative.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ExerciseOfOutstandingStockOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise of outstanding stock options [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ExerciseOfOutstandingStockOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exercise of Outstanding Stock Options [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FourthSecuritiesPurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fourth Securities Purchase Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FourthPIPEFinancingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">The "Fourth PIPE Financing" [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_FourthPIPEFinancingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fourth PIPEFinancing Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IPOMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">IPO [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityReverseStockSplit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reverse stock splits</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityReverseStockSplit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders' Equity, Reverse Stock Split</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_BuildingOperatingExpensesProRataSharePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Building operating expenses pro rata share percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_BuildingOperatingExpensesProRataSharePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The Company's proportionate percentage share of the building's operating expenses and real estate taxes exceeding the applicable base-year amounts.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_LeaseExtensionOptionMonthlyBaseRent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease extension option monthly base rent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_LeaseExtensionOptionMonthlyBaseRent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Extension Option Monthly Base Rent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_LeaseExtensionOptionMonthlyBaseRent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of lease extension option monthly base rent.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Counterparty Name [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Counterparty Name [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SMBCBakerLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SMBC Baker, LLC [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SecurityDepositPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security deposits payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SecurityDepositPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Security Deposit Payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SecurityDepositPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">It represents amount of security deposit payable.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeriesAConversionPriceFloorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series A Conversion Price Floor [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeriesAConversionPriceFloorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series AConversion Price Floor Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeriesCConversionPriceFloorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series C Conversion Price Floor [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SeriesCConversionPriceFloorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series CConversion Price Floor Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SuccessorSeriesEConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Successor Series E Convertible Preferred Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SuccessorSeriesEConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Successor Series EConvertible Preferred Stock Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investor [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investor [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidatedEntitiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidated Entities [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidatedEntitiesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidated Entities [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StellaDiagnosticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stella Diagnostics, Inc [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_StellaDiagnosticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stella Diagnostics Inc Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_BankruptcyTriggeringEventRedemptionRightMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bankruptcy Triggering Event Redemption Right [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_BankruptcyTriggeringEventRedemptionRightMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bankruptcy Triggering Event Redemption Right Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SuccessorSeriesCConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Successor Series C Convertible Preferred Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_SuccessorSeriesCConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Successor Series CConvertible Preferred Stock Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConversionOfStockNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conversion of Stock, Name [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AlternateConversionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Alternate Conversion [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_AlternateConversionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Alternate Conversion Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesSubscriptions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subscription receivable (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesSubscriptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Value, Subscriptions</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReimbursementExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reimburse amount (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReimbursementExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reimbursement Expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReimbursementExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of reimbursement expenses.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fees payments (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments for Other Fees</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfConversionPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of conversion price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfConversionPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Conversion Price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfConversionPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of conversion price.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Preferred stock par value (in Dollars per share)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, par value (in Dollars per share)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Preferred stock stated value per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Par or Stated Value Per Share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainLossFromChangeInFairValueOfEarnoutLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain from the change in fair value of the earnout liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainLossFromChangeInFairValueOfEarnoutLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain Loss From Change In Fair Value Of Earnout Liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_GainLossFromChangeInFairValueOfEarnoutLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the gain or loss from change in fair value of earnout liability.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfDividendYieldAssumption_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected dividend yield</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfDividendYieldAssumption_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Dividend Yield Assumption</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_PercentageOfDividendYieldAssumption_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of dividend yield assumption.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of operating segments (in Segments)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Operating Segments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfReportingUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of reporting segments (in Segments)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfReportingUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill, Reporting Unit, Number</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current Fiscal Year End Date</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unamortized stock-based compensation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unamortized Debt Issuance Expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intrinsic value of outstanding stock options</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_TitleOfIndividualAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title and Position [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_TitleOfIndividualWithRelationshipToEntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title and Position [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_BoardOfDirectorsChairmanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Board of Directors Chairman [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_BoardOfDirectorsChairmanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Board of Directors [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_BoardOfDirectorsChairmanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Board of Directors Chairman [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Year Focus</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Current Reporting Status</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Filer Category</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity File Number</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Shell Company</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Emerging Growth Company</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityExTransitionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Ex Transition Period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntitySmallBusiness_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Small Business</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current assets:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Current [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash, restricted cash, and cash equivalents</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Equivalents, at Carrying Value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Exercise Price Per Share, Options granted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageOptionsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Remaining Contractual Life (in years), Options granted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageOptionsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Options Granted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageOptionsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Outstanding Shares, Ending balance</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Outstanding Shares, Beginning balance</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Stockholders' Equity [Abstract]</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right [Table]</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Table]</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title of 12(b) Security</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ConversionOfSeriesASeriesBSeriesCAndSeriesDPreferredStockToCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Conversion of Series A, Series B, Series C and Series D preferred stock to common stock.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_IncreaseInDebtDiscountAndDerivativeLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase in debt discount and derivative liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_IncreaseInDebtDiscountAndDerivativeLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase In Debt Discount And Derivative Liabilities</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfDeferredOfferingCostsToAdditionalPaidinCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification of deferred offering costs to additional paid-in capital</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfDeferredOfferingCostsToAdditionalPaidinCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification Of Deferred Offering Costs To Additional Paidin Capital</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfDeferredOfferingCostsToAdditionalPaidinCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reclassification of deferred offering costs to additional paid-in capital</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfAccruedExpensesToAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification of accrued expenses to accounts payable</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfAccruedExpensesToAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reclassification of accrued expenses to accounts payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_IssuanceOfSeriesDPreferredStockForInvestmentInEquitySecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of Series D Preferred Stock for investment in equity securities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_IssuanceOfSeriesDPreferredStockForInvestmentInEquitySecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Of Series DPreferred Stock For Investment In Equity Securities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_IssuanceOfSeriesDPreferredStockForInvestmentInEquitySecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance of Series D Preferred Stock for investment in equity securities.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization and Description of the Business [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ORGANIZATION AND DESCRIPTION OF THE BUSINESS</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfPrivatePlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate cash proceeds (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfPrivatePlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Private Placement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of warrants exercised (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Exercised</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross proceeds (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockConvertibleSharesIssuable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued preferred stock (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockConvertibleSharesIssuable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Convertible, Shares Issuable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Noncash Expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_CommonFebruary2024PIPEWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">February 2024 Series A Common Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_CommonFebruary2024PIPEWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common February2024 PIPEWarrants Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_CommonSeptember2024PIPEWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">September 2024 Series C Common Warrants [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_CommonDecember2024InducementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">December 2024 Common Warrants [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_JanuaryTwoThousandTwentyFiveWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">January 2025 Common Warrants [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_CommonStockParValue00001PerShareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock, par value $0.0001 per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_CommonStockParValue00001PerShareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Par Value00001 Per Share Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WarrantsEachWarrantExercisableForOneTwothousandthsOfAShareOfCommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants, each warrant exercisable for one two-thousandths of a share of Common Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WarrantsEachWarrantExercisableForOneTwothousandthsOfAShareOfCommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Each Warrant Exercisable For One Twothousandths Of AShare Of Common Stock Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Information [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentQuarterlyReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Quarterly Report</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ProceedsFromSharePurchasesUnderELOCNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from share purchases under ELOC, net of issuance costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ProceedsFromSharePurchasesUnderELOCNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Share Purchases Under ELOCNet Of Issuance Costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ProceedsFromSharePurchasesUnderELOCNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of proceeds from share purchases under ELOC, net of issuance costs.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, shares authorized (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Shares Authorized</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock liability, shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquityLiquidationPreference_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock liabilities, liquidation preference</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquityLiquidationPreference_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity, Liquidation Preference</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquitySharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock liabilities, shares outstanding (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquitySharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity, Shares Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquitySharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock liabilities, shares issued (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquitySharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity, Shares Issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ProceedsReceivedFromSaleOfSeriesDPreferredStockNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds received from sale of Series D Preferred Stock, net of issuance costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ProceedsReceivedFromSaleOfSeriesDPreferredStockNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds Received From Sale Of Series DPreferred Stock Net Of Issuance Costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ProceedsReceivedFromSaleOfSeriesDPreferredStockNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The cash inflow received from sale of Series D Preferred Stock, net of issuance costs.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ProceedsReceivedFromSaleOfPrefundedWarrantsNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds received from sale of pre-funded warrants, net of issuance costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ProceedsReceivedFromSaleOfPrefundedWarrantsNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds Received From Sale Of Prefunded Warrants Net Of Issuance Costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ProceedsReceivedFromSaleOfPrefundedWarrantsNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The cash inflow received from sale of pre-funded warrants, net of issuance costs.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromWarrantExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from exercise of pre-funded warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromWarrantExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Warrant Exercises</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRepurchaseOfOtherEquity_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Cash redemption of Series C Preferred Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRepurchaseOfOtherEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments for Repurchase of Other Equity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash provided by financing activities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net decrease in cash, restricted cash and cash equivalents</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">NON-CASH FINANCING ACTIVITIES:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash, Noncurrent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesNoncurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term liabilities:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesNoncurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Noncurrent [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain on debt extinguishment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gain on debt extinguishment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Extinguishment of Debt, Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WriteOffOfDeferredOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Write off of deferred offering costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WriteOffOfDeferredOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Write off of deferred offering costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WriteOffOfDeferredOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Write Off of Deferred Offering Costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WriteOffOfDeferredOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Write off of deferred offering costs amount.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to reconcile net loss to net cash used in operating activities:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CASH FLOWS FROM INVESTING ACTIVITIES:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Investing Activity, Continuing Operation [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromSaleOfEquitySecuritiesFvNi_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from sale of equity securities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromSaleOfEquitySecuritiesFvNi_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Sale of Equity Securities, FV-NI</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash provided by investing activities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Investing Activity, Including Discontinued Operation, Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in assets and liabilities:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from notes payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Notes Payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Payment of deferred offering costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments of Debt Issuance Costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_CashPaidForAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash paid for:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_CashPaidForAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash paid for [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash (short-term)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash and Cash Equivalent, Current, Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash (long-term)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash and Cash Equivalent, Noncurrent, Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfConvertibleNotesPayableAndAccruedInterestToNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification of convertible notes payable and accrued interest to notes payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfConvertibleNotesPayableAndAccruedInterestToNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of Reclassification of convertible notes payable and accrued interest to notes payable.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfAccountsPayableToNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification of accounts payable to notes payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfAccountsPayableToNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of Reclassification of accounts payable to notes payable.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_IncreaseInOperatingLeaseRight-of-useAssetAndOperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase in operating lease right-of-use asset and operating lease liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_IncreaseInOperatingLeaseRight-of-useAssetAndOperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase in operating lease right-of-use asset and operating lease liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_IncreaseInOperatingLeaseRight-of-useAssetAndOperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of Increase in operating lease right-of-use asset and operating lease liability.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WriteOffOfSubscriptionReceivableDeemedOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Write off of subscription receivable deemed offering costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_WriteOffOfSubscriptionReceivableDeemedOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of Write off of subscription receivable deemed offering costs.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfSeriesDAndSeriesEPreferredStockFairValueToPreferredStockLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification of Series D and Series E preferred stock fair value to preferred stock liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfSeriesDAndSeriesEPreferredStockFairValueToPreferredStockLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification of Series D and Series E preferred stock fair value to preferred stock liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfSeriesDAndSeriesEPreferredStockFairValueToPreferredStockLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of Reclassification of Series D and Series E preferred stock fair value to preferred stock liabilities.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfSeriesDAndEPreferredStockFairValueFromPreferredStockLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification of Series D preferred stock fair value from preferred stock liabilities to equity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfSeriesDAndEPreferredStockFairValueFromPreferredStockLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification of Series D and E preferred stock fair value from preferred stock liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfSeriesDAndEPreferredStockFairValueFromPreferredStockLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of Reclassification of Series D and E preferred stock fair value from preferred stock liabilities.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfSeriesEPreferredStockFairValueOfPreferredStockLiabilitiesToPaid-inCapitalUponConversion_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification of Series E preferred stock fair value from preferred stock liabilities to paid-in capital upon conversion</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfSeriesEPreferredStockFairValueOfPreferredStockLiabilitiesToPaid-inCapitalUponConversion_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification of Series E preferred stock fair value of preferred stock liabilities to paid-in capital upon conversion</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfSeriesEPreferredStockFairValueOfPreferredStockLiabilitiesToPaid-inCapitalUponConversion_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of Reclassification of Series E preferred stock fair value of preferred stock liabilities to paid-in capital upon conversion.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOtherIncreasesDecreasesInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exceeded the number of shares reserved options</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOtherIncreasesDecreasesInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Other Increases (Decreases) in Period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfFairValueOfPreferredStockFromPreferredStockLiabilitiesSeriesD_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification of fair value of preferred stock from preferred stock liabilities - Series D</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfFairValueOfPreferredStockFromPreferredStockLiabilitiesSeriesD_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification of fair value of preferred stock from preferred stock liabilities Series D</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cero_ReclassificationOfFairValueOfPreferredStockFromPreferredStockLiabilitiesSeriesD_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of increase (decrease) to additional paid in capital (APIC) resulting from changes in fair value of reclassification of fair value of preferred stock liabilities series D.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Other Income (Expenses), net</link:label>
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