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    <import namespace="http://www.xbrl.org/dtr/type/2022-03-31" schemaLocation="https://www.xbrl.org/dtr/type/2022-03-31/types.xsd" />
    <import namespace="http://xbrl.sec.gov/ecd/2025" schemaLocation="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd" />
    <import namespace="http://xbrl.sec.gov/country/2025" schemaLocation="https://xbrl.sec.gov/country/2025/country-2025.xsd" />
    <import namespace="http://fasb.org/srt/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd" />
    <import namespace="http://xbrl.sec.gov/cyd/2025" schemaLocation="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd" />
    <import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" />
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    <element id="IMNN_ClinicalResearchMember" name="ClinicalResearchMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
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    <element id="IMNN_OvationThreeMember" name="OvationThreeMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_PlaccineVaccineMember" name="PlaccineVaccineMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_OtherClinicalAndRegulatoryMember" name="OtherClinicalAndRegulatoryMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
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    <element id="IMNN_SalesAgreementMember" name="SalesAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
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    <element id="IMNN_PlacementAgentsWarrantMember" name="PlacementAgentsWarrantMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_DecemberTwoThousandTwentyFiveOfferingMember" name="DecemberTwoThousandTwentyFiveOfferingMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
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    <element id="IMNN_PreFundedWarrantMember" name="PreFundedWarrantMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_PrefundedWarrantAndSharesMember" name="PrefundedWarrantAndSharesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
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    <element id="IMNN_WarrantsMember" name="WarrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_CompanyWithAffiliatesMember" name="CompanyWithAffiliatesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_PreFundedWarrantsAndWarrantsMember" name="PreFundedWarrantsAndWarrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
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    <element id="IMNN_EquityStockAwardsMember" name="EquityStockAwardsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_GrantedUnderTwoThousandEighteenPlanMember" name="GrantedUnderTwoThousandEighteenPlanMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_GrantedUnderTwoThousandEighteenPlanAndPriorPlanMember" name="GrantedUnderTwoThousandEighteenPlanAndPriorPlanMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_InducementOptionGrantsMember" name="InducementOptionGrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_GrantedUnderTwoThousandEighteenPlanAndTwoThousandSevenPlanMember" name="GrantedUnderTwoThousandEighteenPlanAndTwoThousandSevenPlanMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_InducementAwardsMember" name="InducementAwardsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_EmployeeStockOptionAndRestrictedStockAwardsMember" name="EmployeeStockOptionAndRestrictedStockAwardsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_ResearchAndDevelopmentExpensesMember" name="ResearchAndDevelopmentExpensesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_GeneralAndAdministrativeExpensesMember" name="GeneralAndAdministrativeExpensesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_GrantedUnderTwoThousandEighteenPlanAdoptionMember" name="GrantedUnderTwoThousandEighteenPlanAdoptionMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_GrantedUnderTwoThousandEighteenPlanAmendmentOneMember" name="GrantedUnderTwoThousandEighteenPlanAmendmentOneMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_GrantedUnderTwoThousandEighteenPlanAmendmentTwoMember" name="GrantedUnderTwoThousandEighteenPlanAmendmentTwoMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_GrantedUnderTwoThousandEighteenPlanAmendmentThreeMember" name="GrantedUnderTwoThousandEighteenPlanAmendmentThreeMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_GrantedUnderTwoThousandEighteenPlanAmendmentFourMember" name="GrantedUnderTwoThousandEighteenPlanAmendmentFourMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_GrantedUnderTwoThousandEighteenPlanAmendmentFiveMember" name="GrantedUnderTwoThousandEighteenPlanAmendmentFiveMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_ExercisePriceOneMember" name="ExercisePriceOneMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_ExercisePriceTwoMember" name="ExercisePriceTwoMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_ExercisePriceThreeMember" name="ExercisePriceThreeMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_LawrencevilleNewJerseyLeaseMember" name="LawrencevilleNewJerseyLeaseMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_HuntsvilleAlabamaLeaseMember" name="HuntsvilleAlabamaLeaseMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_FairValueOfSharesIssuedInExchangeForServices" name="FairValueOfSharesIssuedInExchangeForServices" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_NoncashEffectOfReverseStockSplit" name="NoncashEffectOfReverseStockSplit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_RecognitionOfRightUseAssetAndLiability" name="RecognitionOfRightUseAssetAndLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_StockIssuedDuringPeriodValueReverseStockSplits" name="StockIssuedDuringPeriodValueReverseStockSplits" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_StockIssuedDuringPeriodValueStockDividendNet" name="StockIssuedDuringPeriodValueStockDividendNet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_StockIssuedDuringPeriodSharesStockDividendNet" name="StockIssuedDuringPeriodSharesStockDividendNet" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_IssuanceOfCommonStockUponExerciseOfCommonStockWarrants" name="IssuanceOfCommonStockUponExerciseOfCommonStockWarrants" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_IssuanceOfCommonStockUponExerciseOfCommonStockWarrantsShares" name="IssuanceOfCommonStockUponExerciseOfCommonStockWarrantsShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
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    <element id="IMNN_DisclosureWarrantsAbstract" name="DisclosureWarrantsAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_WarrantsTextBlock" name="WarrantsTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_DisclosureLeasesAbstract" name="DisclosureLeasesAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_AdvancesAndDepositsOnClinicalProgramsAndOtherCurrentAssetsPolicyTextBlock" name="AdvancesAndDepositsOnClinicalProgramsAndOtherCurrentAssetsPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_DepositsPolicyTextBlock" name="DepositsPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_WarrantAccountingPolicyTextBlock" name="WarrantAccountingPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_ScheduleOfAnnualStockholdersMeetingPlanAmendmentsTableTextBlock" name="ScheduleOfAnnualStockholdersMeetingPlanAmendmentsTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_DepreciationExpense" name="DepreciationExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_NumberOfSharesOfCommonStockIssuableUponExerciseOfWarrantsAndEquityAwards" name="NumberOfSharesOfCommonStockIssuableUponExerciseOfWarrantsAndEquityAwards" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_IncreaseDecreaseInOperatingCostAndExpenses" name="IncreaseDecreaseInOperatingCostAndExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_IncreaseDecreaseInOperatingCostsAndExpensesPercentage" name="IncreaseDecreaseInOperatingCostsAndExpensesPercentage" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_IncreaseDecreaseInResearchAndDevelopmentExpensesPercentage" name="IncreaseDecreaseInResearchAndDevelopmentExpensesPercentage" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_IncreaseDecreaseInGeneralAndAdministrativeExpenes" name="IncreaseDecreaseInGeneralAndAdministrativeExpenes" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_IncreaseDecreaseInGeneralAndAdministrativeExpensesPercentage" name="IncreaseDecreaseInGeneralAndAdministrativeExpensesPercentage" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_IncreaseDecreaseInOperatingExpenses" name="IncreaseDecreaseInOperatingExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_IncreaseDecreaseInOperatingExpensesPercentage" name="IncreaseDecreaseInOperatingExpensesPercentage" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_IncreaseDecreaseInLossFromOperations" name="IncreaseDecreaseInLossFromOperations" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_IncreaseDecreaseInLossFromOperationsPercentage" name="IncreaseDecreaseInLossFromOperationsPercentage" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_IncomeTaxReconciliationNetLossIncomeTaxRate" name="IncomeTaxReconciliationNetLossIncomeTaxRate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_EffectiveIncomeTaxRateReconciliationAtNetLossIncomeTaxRate" name="EffectiveIncomeTaxRateReconciliationAtNetLossIncomeTaxRate" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_IncomeTaxReconciliationChangeInValuationAllowance" name="IncomeTaxReconciliationChangeInValuationAllowance" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_EffectiveIncomeTaxRateReconciliationChangeInValuationAllowance" name="EffectiveIncomeTaxRateReconciliationChangeInValuationAllowance" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_EffectiveIncomeTaxRateReconciliationPermanentDifferences" name="EffectiveIncomeTaxRateReconciliationPermanentDifferences" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_EffectiveIncomeTaxRateReconciliationTimeUp" name="EffectiveIncomeTaxRateReconciliationTimeUp" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_EffectiveIncomeTaxRateReconciliationDeferredStatutoryRate" name="EffectiveIncomeTaxRateReconciliationDeferredStatutoryRate" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_IncomeTaxReconciliationExpiredNetOperatingLossFederalIncomeTaxRate" name="IncomeTaxReconciliationExpiredNetOperatingLossFederalIncomeTaxRate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
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    <element id="IMNN_StatementOfIncomeLocationBalanceDomain" name="StatementOfIncomeLocationBalanceDomain" abstract="true" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
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    <element id="IMNN_StockAwardsReduced" name="StockAwardsReduced" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_StockDividendRatePercentage" name="StockDividendRatePercentage" nillable="true" xbrli:periodType="instant" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_DividendsCommonStocktPerShare" name="DividendsCommonStocktPerShare" nillable="true" xbrli:periodType="instant" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
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    <element id="IMNN_RemainingShareAmount" name="RemainingShareAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_AdditionalProspectusSupplementAmount" name="AdditionalProspectusSupplementAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
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    <element id="IMNN_StockOptionsStrikePriceDescription" name="StockOptionsStrikePriceDescription" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice" nillable="true" xbrli:periodType="instant" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionGrantsInPeriodWeightedAverageExercisePrice" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionGrantsInPeriodWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionCashlessEquityInstrumentsExercised" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionCashlessEquityInstrumentsExercised" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsCashlessExercisesInPeriodWeightedAverageExercisePrice" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsCashlessExercisesInPeriodWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_SharebasedCompensationArrangementBySharebasedPaymentAwardNonOptionsOutstandingWeightedAverageRemainingContractualTerm2" name="SharebasedCompensationArrangementBySharebasedPaymentAwardNonOptionsOutstandingWeightedAverageRemainingContractualTerm2" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="IMNN_OperatingLeasesIncrementalBorrowingRate" name="OperatingLeasesIncrementalBorrowingRate" nillable="true" xbrli:periodType="instant" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
</schema>
