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  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsIssuedToInvestors" id="nnvc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsIssuedToInvestors" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsIssuedToInvestorsWeightedAverageExercisePrice" id="nnvc_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsIssuedToInvestorsWeightedAverageExercisePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsIssuedToInvestorsWeightedAverageRemainingContractualTerm" id="nnvc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsIssuedToInvestorsWeightedAverageRemainingContractualTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NetProceedsFromIssuanceOfCommonStockAndCommonStockWarrants" id="nnvc_NetProceedsFromIssuanceOfCommonStockAndCommonStockWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="BaseSalary" id="nnvc_BaseSalary" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="TermLifeInsurancePolicyValue" id="nnvc_TermLifeInsurancePolicyValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="TermLifeInsurancePolicyValueAssignedToCompany" id="nnvc_TermLifeInsurancePolicyValueAssignedToCompany" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="EmploymentAgreementTerm" id="nnvc_EmploymentAgreementTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AdditionalPreferredStockSharesIssued" id="nnvc_AdditionalPreferredStockSharesIssued" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="IncreaseInBaseSalary" id="nnvc_IncreaseInBaseSalary" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="StockIssuedDuringPeriodValueNewIssuesCashUponCompletionOfPhase1ClinicalTrials" id="nnvc_StockIssuedDuringPeriodValueNewIssuesCashUponCompletionOfPhase1ClinicalTrials" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="StockIssuedDuringPeriodValueNewIssuesCashUponCompletionOfPhase2ClinicalTrials" id="nnvc_StockIssuedDuringPeriodValueNewIssuesCashUponCompletionOfPhase2ClinicalTrials" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="StockIssuedDuringPeriodValueNewIssuesCashUponCompletionOfPhase3ClinicalTrials" id="nnvc_StockIssuedDuringPeriodValueNewIssuesCashUponCompletionOfPhase3ClinicalTrials" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="NumberOfSharesIssuableUponExecutionOfAgreement" id="nnvc_NumberOfSharesIssuableUponExecutionOfAgreement" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ThresholdPeriodForIssuanceOfSharesUponExecutionOfAgreement" id="nnvc_ThresholdPeriodForIssuanceOfSharesUponExecutionOfAgreement" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="StockIssuedDuringPeriodValueNewIssuesInitiationOfPhase1ClinicalTrials" id="nnvc_StockIssuedDuringPeriodValueNewIssuesInitiationOfPhase1ClinicalTrials" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="StockIssuedDuringPeriodValueNewIssuesInitiationOfPhase3ClinicalTrials" id="nnvc_StockIssuedDuringPeriodValueNewIssuesInitiationOfPhase3ClinicalTrials" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="StockIssuedDuringPeriodValueNewIssuesCompletionOfPhase3ClinicalTrials" id="nnvc_StockIssuedDuringPeriodValueNewIssuesCompletionOfPhase3ClinicalTrials" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AdditionalCommonStockSharesIssued" id="nnvc_AdditionalCommonStockSharesIssued" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="PropertyPlantAndEquipmentFullyDepreciatedCost" id="nnvc_PropertyPlantAndEquipmentFullyDepreciatedCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="SalesAgentCommissionPercentage" id="nnvc_SalesAgentCommissionPercentage" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="CommonWarrantsMember" id="nnvc_CommonWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RegisteredDirectOfferingNovember102025Member" id="nnvc_RegisteredDirectOfferingNovember102025Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RegisteredDirectOfferingMay152026Member" id="nnvc_RegisteredDirectOfferingMay152026Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AccountsPayableAssignedFromAnotherRelatedPartyCurrent" id="nnvc_AccountsPayableAssignedFromAnotherRelatedPartyCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AccountsPayableAssignedToAnotherRelatedPartyCurrent" id="nnvc_AccountsPayableAssignedToAnotherRelatedPartyCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PaymentOfClinicalTrialCosts" id="nnvc_PaymentOfClinicalTrialCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AtMarketSalesAgreementMember" id="nnvc_AtMarketSalesAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="July272026RegisteredDirectOfferingMember" id="nnvc_July272026RegisteredDirectOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ClinicalTrailCostsIncurred" id="nnvc_ClinicalTrailCostsIncurred" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ClinicalTrailCost" id="nnvc_ClinicalTrailCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ClinicalTrialCommitmentLiability" id="nnvc_ClinicalTrialCommitmentLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
</xsd:schema>
