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  <xsd:element id="vacc_IncreaseDecreaseInResearchAndDevelopmentIncentivesReceivable" name="IncreaseDecreaseInResearchAndDevelopmentIncentivesReceivable" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
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  <xsd:element id="vacc_ShareholderUniversityOfOxfordMember" name="ShareholderUniversityOfOxfordMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="vacc_OxfordUniversityInnovationLimitedMember" name="OxfordUniversityInnovationLimitedMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="vacc_LeaseOfLaboratoryAndOfficeSpaceInOxfordMember" name="LeaseOfLaboratoryAndOfficeSpaceInOxfordMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="vacc_ClinicalStudyCostsMember" name="ClinicalStudyCostsMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="vacc_DebtInstrumentConvertibleConversionPriceMultiplier" name="DebtInstrumentConvertibleConversionPriceMultiplier" nillable="true" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="vacc_DebtInstrumentConvertibleBeneficialConversionAndRedemptionFeature" name="DebtInstrumentConvertibleBeneficialConversionAndRedemptionFeature" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="vacc_RedeemableNoncontrollingInterestDisclosureTextBlock" name="RedeemableNoncontrollingInterestDisclosureTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
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  <xsd:element id="vacc_TemporaryEquitySharesIssuedUponAutomaticConversion" name="TemporaryEquitySharesIssuedUponAutomaticConversion" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <xsd:element id="vacc_InLicenseAgreementsMember" name="InLicenseAgreementsMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="vacc_PercentageOfFutureRoyaltiesForDirectSalesOfCoveredProductLicenseAgreement" name="PercentageOfFutureRoyaltiesForDirectSalesOfCoveredProductLicenseAgreement" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="vacc_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" name="LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="vacc_LesseeOperatingLeaseRightOfUseAssetAndOtherInformationTableTextBlock" name="LesseeOperatingLeaseRightOfUseAssetAndOtherInformationTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="vacc_LesseeOperatingLeaseOtherInformationTableTextBlock" name="LesseeOperatingLeaseOtherInformationTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
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  <xsd:element id="vacc_PercentageOfNetPaymentsReceivedForAllowableSublicensesOfTechnologyDevelopedLicenseAgreement" name="PercentageOfNetPaymentsReceivedForAllowableSublicensesOfTechnologyDevelopedLicenseAgreement" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
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  <xsd:element id="vacc_StockholdersEquityDeferredSharesDisclosureTextBlock" name="StockholdersEquityDeferredSharesDisclosureTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
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  <xsd:element id="vacc_ShareBasedCompensationPercentageOfSharesAvailableForIssuanceAsPercentageOfIssuedAndOutstandingShares" name="ShareBasedCompensationPercentageOfSharesAvailableForIssuanceAsPercentageOfIssuedAndOutstandingShares" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="vacc_EnterpriseManagementIncentiveShareOptionSchemeMember" name="EnterpriseManagementIncentiveShareOptionSchemeMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="vacc_ContractWithCustomerLiabilityForeignExchangeTranslation" name="ContractWithCustomerLiabilityForeignExchangeTranslation" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="vacc_NumberOfSquareFeetUnderLeaseAgreement" name="NumberOfSquareFeetUnderLeaseAgreement" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="vacc_ShareholderOfOxfordSciencesEnterprisesPlcMember" name="ShareholderOfOxfordSciencesEnterprisesPlcMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
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  <xsd:element id="vacc_RightOfUseAssetAndLiabilityAdjustment" name="RightOfUseAssetAndLiabilityAdjustment" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
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  <xsd:element name="AggregateRsusGrantedAsPercentageOfTotalFullyDilutedShareCapital" id="vacc_AggregateRsusGrantedAsPercentageOfTotalFullyDilutedShareCapital" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
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  <xsd:element name="RefundReceivedFromRelatedParty" id="vacc_RefundReceivedFromRelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
</xsd:schema>
