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  <xsd:element name="CustomerPaymentTerm" id="iova_CustomerPaymentTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="LicenseAgreementAmortizationOfMilestonePayment" id="iova_LicenseAgreementAmortizationOfMilestonePayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ProceedsFromIssuanceOfCommonStockUnderEmployeeStockPurchasePlan" id="iova_ProceedsFromIssuanceOfCommonStockUnderEmployeeStockPurchasePlan" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="SecondAmendedAndRestatedPatentLicenseAgreementMember" id="iova_SecondAmendedAndRestatedPatentLicenseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AmtagviMember" id="iova_AmtagviMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ScheduleOfGrossToNetAdjustmentsInRevenueTableTextBlock" id="iova_ScheduleOfGrossToNetAdjustmentsInRevenueTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="RevenueFromContractWithCustomerGross" id="iova_RevenueFromContractWithCustomerGross" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RevenueFromContractWithCustomerGrossToNetAdjustmentsAbstract" id="iova_RevenueFromContractWithCustomerGrossToNetAdjustmentsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AdjustmentsForGovernmentRebatesAndChargebacks" id="iova_AdjustmentsForGovernmentRebatesAndChargebacks" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AdjustmentsForWholesalerFeesAndCashDiscounts" id="iova_AdjustmentsForWholesalerFeesAndCashDiscounts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AdjustmentsForOtherRebatesReturnsDiscountsAndAdjustments" id="iova_AdjustmentsForOtherRebatesReturnsDiscountsAndAdjustments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="RevenueFromContractWithCustomerGrossToNetAdjustments" id="iova_RevenueFromContractWithCustomerGrossToNetAdjustments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="CustomerMember" id="iova_CustomerMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OtherCustomersMember" id="iova_OtherCustomersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ThresholdForConcentrationOfCreditRisk" id="iova_ThresholdForConcentrationOfCreditRisk" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="SharesIssuedInBreachOfFiduciaryDuty" id="iova_SharesIssuedInBreachOfFiduciaryDuty" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PatentLicenseAgreementRelatedToPhase2ClinicalStudyInMelanomaMember" id="iova_PatentLicenseAgreementRelatedToPhase2ClinicalStudyInMelanomaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ImpairmentOfLongLivedAssetsDueToEarlyTerminationOfLease" id="iova_ImpairmentOfLongLivedAssetsDueToEarlyTerminationOfLease" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DebtSecuritiesAvailableForSaleAllowanceForCreditLossImpairmentLoss" id="iova_DebtSecuritiesAvailableForSaleAllowanceForCreditLossImpairmentLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="SingleReportableSegmentMember" id="iova_SingleReportableSegmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SubLeaseAgreementMember" id="iova_SubLeaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="LesseeOperatingLeaseNumberOfOptionsToExtendLease" id="iova_LesseeOperatingLeaseNumberOfOptionsToExtendLease" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="LesseeOperatingLeaseExtensionPercentageOfIncreaseInMonthlyBaseRent" id="iova_LesseeOperatingLeaseExtensionPercentageOfIncreaseInMonthlyBaseRent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="LesseeOperatingLeaseMonthlyBaseRent" id="iova_LesseeOperatingLeaseMonthlyBaseRent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AreaOfLandSurrendered" id="iova_AreaOfLandSurrendered" type="dtr-types:areaItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="LesseeOperatingLeaseAmountOfEarlyLeaseTerminationFeesPaid" id="iova_LesseeOperatingLeaseAmountOfEarlyLeaseTerminationFeesPaid" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LesseeOperatingLeaseAmountOfBrokerageFeePaid" id="iova_LesseeOperatingLeaseAmountOfBrokerageFeePaid" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DerecognitionOfOperatingLeaseRightOfUseAssets" id="iova_DerecognitionOfOperatingLeaseRightOfUseAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DerecognitionOfOperatingLeaseLiabilities" id="iova_DerecognitionOfOperatingLeaseLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="RightOfUseAssetObtainedReducedInExchangeForOperatingLeaseLiabilityFromLeaseModifications" id="iova_RightOfUseAssetObtainedReducedInExchangeForOperatingLeaseLiabilityFromLeaseModifications" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PatientDosingInitiationExpenses" id="iova_PatientDosingInitiationExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="NominalDefendantNewClaimsFiledNumber" id="iova_NominalDefendantNewClaimsFiledNumber" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="SecondMinarisManufacturingAndServicesAgreementMember" id="iova_SecondMinarisManufacturingAndServicesAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ComputerSoftwareMember" id="iova_ComputerSoftwareMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="InventoryNetCurrentAndNoncurrent" id="iova_InventoryNetCurrentAndNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="StockBasedCompensationIncludedInCostOfSales" id="iova_StockBasedCompensationIncludedInCostOfSales" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="LicensesAndAgreementsTable" id="iova_LicensesAndAgreementsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="LicensesAndAgreementsLineItems" id="iova_LicensesAndAgreementsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SharebasedcompensationarrangementbysharebasedpaymentawardoptionsremainingcontractuallifeAbstract" id="iova_SharebasedcompensationarrangementbysharebasedpaymentawardoptionsremainingcontractuallifeAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NonCashStockBasedCompensationIncludedInCostOfSales" id="iova_NonCashStockBasedCompensationIncludedInCostOfSales" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="NonCashStockBasedCompensationIncludedInResearchAndDevelopment" id="iova_NonCashStockBasedCompensationIncludedInResearchAndDevelopment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="NonCashStockBasedCompensationIncludedInSellingGeneralAndAdministrative" id="iova_NonCashStockBasedCompensationIncludedInSellingGeneralAndAdministrative" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="SaleAgreement2025Member" id="iova_SaleAgreement2025Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AmortizationOfIntangibleAssetsExcludingNonCashAmortizationExpense" id="iova_AmortizationOfIntangibleAssetsExcludingNonCashAmortizationExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="InventoryWriteDownIncludingExpenseFromPy" id="iova_InventoryWriteDownIncludingExpenseFromPy" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="SalesAgreementAuthorizedSharesRemainingToBeIssuedAmount" id="iova_SalesAgreementAuthorizedSharesRemainingToBeIssuedAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ManufacturingContractsMember" id="iova_ManufacturingContractsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="LeaseTerminationNoticePeriod" id="iova_LeaseTerminationNoticePeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
</xsd:schema>
