﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2019v5.0" xsi:schemaLocation="http://www.irs.gov/efile">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2022-05-13T15:40:27-07:00</ReturnTs>
    <TaxPeriodEndDt>2020-06-30</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>952076568</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>Leaf &amp; Cole LLP</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>2810 Camino Del Rio South Suite 200</AddressLine1Txt>
        <CityNm>San Diego</CityNm>
        <StateAbbreviationCd>CA</StateAbbreviationCd>
        <ZIPCd>92108</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2019-07-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>330903864</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>VACCINE RESEARCH INSTITUTE OF SAN DIEGO</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>VACC</BusinessNameControlTxt>
      <PhoneNum>8585813960</PhoneNum>
      <USAddress>
        <AddressLine1Txt>3030 BUNKER HILL ST</AddressLine1Txt>
        <CityNm>SAN DIEGO</CityNm>
        <StateAbbreviationCd>CA</StateAbbreviationCd>
        <ZIPCd>92109</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>JOHN WELSH PHD</PersonNm>
      <PersonTitleTxt>CEO</PersonTitleTxt>
      <SignatureDt>2022-05-13</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <PreparerPersonGrp>
      <PreparerPersonNm>LATONYA M KNOX</PreparerPersonNm>
      <PTIN>P00513874</PTIN>
      <PhoneNum>6192947200</PhoneNum>
    </PreparerPersonGrp>
    <TaxYr>2019</TaxYr>
    <BuildTS>2022-09-23 18:48:47Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="4">
    <IRS990EZ documentId="IRS990EZ" referenceDocumentId="IRS990ScheduleO TransfersPersonalBenefitsContr" softwareId="19009920" softwareVersionNum="2019v5.0">
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <WebsiteAddressTxt>www.vrisd.org</WebsiteAddressTxt>
      <Organization501c3Ind referenceDocumentId="IRS990ScheduleA">X</Organization501c3Ind>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>100099</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>98519</ContributionsGiftsGrantsEtcAmt>
      <InvestmentIncomeAmt>80</InvestmentIncomeAmt>
      <SaleOfAssetsGrossAmt>1500</SaleOfAssetsGrossAmt>
      <CostOrOtherBasisExpenseSaleAmt>0</CostOrOtherBasisExpenseSaleAmt>
      <GainOrLossFromSaleOfAssetsAmt>1500</GainOrLossFromSaleOfAssetsAmt>
      <FundraisingGrossIncomeAmt>0</FundraisingGrossIncomeAmt>
      <SpecialEventsDirectExpensesAmt>0</SpecialEventsDirectExpensesAmt>
      <CostOfGoodsSoldAmt>0</CostOfGoodsSoldAmt>
      <TotalRevenueAmt>100099</TotalRevenueAmt>
      <SalariesOtherCompEmplBnftAmt>50785</SalariesOtherCompEmplBnftAmt>
      <FeesAndOtherPymtToIndCntrctAmt>7726</FeesAndOtherPymtToIndCntrctAmt>
      <OccupancyRentUtltsAndMaintAmt>49453</OccupancyRentUtltsAndMaintAmt>
      <PrintingPublicationsPostageAmt>25</PrintingPublicationsPostageAmt>
      <OtherExpensesTotalAmt>28028</OtherExpensesTotalAmt>
      <TotalExpensesAmt>136017</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>-35918</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>71295</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>35377</NetAssetsOrFundBalancesEOYAmt>
      <InfoInScheduleOPartIIInd>X</InfoInScheduleOPartIIInd>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>69396</BOYAmt>
        <EOYAmt>8428</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <LandAndBuildingsGrp>
        <EOYAmt>14366</EOYAmt>
      </LandAndBuildingsGrp>
      <OtherAssetsTotalDetail>
        <BOYAmt>34384</BOYAmt>
        <EOYAmt>17256</EOYAmt>
      </OtherAssetsTotalDetail>
      <Form990TotalAssetsGrp>
        <BOYAmt>103780</BOYAmt>
        <EOYAmt>40050</EOYAmt>
      </Form990TotalAssetsGrp>
      <SumOfTotalLiabilitiesGrp>
        <BOYAmt>32485</BOYAmt>
        <EOYAmt>4673</EOYAmt>
      </SumOfTotalLiabilitiesGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>71295</BOYAmt>
        <EOYAmt>35377</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <PrimaryExemptPurposeTxt>OUR MISSION IS SCIENTIFIC RESEARCH FOCUSING ON DEVELOPMENT OF PREVENTATIVE AND THERAPEUTIC TREATMENTS FOR BOTH INFECTIOUS (MAALARIA, HEPATITIS B AND C, AND INFLUENZA) AND NON-INFECTIOUS DISEASES (CANCER AND CARDIOVASCULAR DISEASE).</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>Our mission is scientific research focusing on development of preventative and therapeutic treatments for both infectious (malaria, hepatitis B and C, and influenza) and non-infectious diseases (cancer and cardiovascular disease).These studies involve the development of new cancer therapeutics as well as prophylactic and therapeutic vaccines. The goal is to bring to fruition treatments for diseases which have plagued millions of people worldwide and to share these results with the scientific community and the public.To accomplish these goals the VRISD has recruited and will continue to recruit researchers with expertise in Molecular Biology, Pharmacogenomics, Peptide Chemistry, Bioinformatics, Oncology and Immunology. These areas of expertise will allow us to gain an understanding of the host-pathogen and host-tumor interactions as they relate to effective therapeutic design. VRISD scientists are working together for the purpose of eradicating diseases that have eluded researchers and physicians in the past, with the ultimate goal of providing better health for all people worldwide.</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>107613</GrantsAndAllocationsAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>107613</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JOHN WELSH PHD</PersonNm>
        <TitleTxt>CEO</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>40.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>56246</CompensationAmt>
        <EmployeeBenefitProgramAmt>15690</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>3151</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>DAVID R MILICH PHD</PersonNm>
        <TitleTxt>Chairman</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>2.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>RANDY HORTON</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>TERRY DILLMAN</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <ActivitiesNotPreviouslyRptInd>false</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>false</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>false</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>false</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>false</OrganizationDissolvedEtcInd>
      <Form1120PolFiledInd>false</Form1120PolFiledInd>
      <MadeLoansToFromOfficersInd>false</MadeLoansToFromOfficersInd>
      <TaxImposedUnderIRC4911Amt>0</TaxImposedUnderIRC4911Amt>
      <TaxImposedUnderIRC4912Amt>0</TaxImposedUnderIRC4912Amt>
      <TaxImposedUnderIRC4955Amt>0</TaxImposedUnderIRC4955Amt>
      <EngagedInExcessBenefitTransInd>false</EngagedInExcessBenefitTransInd>
      <TaxImposedOnOrganizationMgrAmt>0</TaxImposedOnOrganizationMgrAmt>
      <TaxReimbursedByOrganizationAmt>0</TaxReimbursedByOrganizationAmt>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <StatesWhereCopyOfReturnIsFldCd>CA</StatesWhereCopyOfReturnIsFldCd>
      <BooksInCareOfDetail>
        <PersonNm>LEAH JOHNSON</PersonNm>
        <USAddress>
          <AddressLine1Txt>3030 BUNKER HILL ST</AddressLine1Txt>
          <CityNm>SAN DIEGO</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>92109</ZIPCd>
        </USAddress>
        <PhoneNum>8585813960</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>false</ForeignFinancialAccountInd>
      <ForeignOfficeInd>false</ForeignOfficeInd>
      <DonorAdvisedFndsInd>false</DonorAdvisedFndsInd>
      <OperateHospitalInd>false</OperateHospitalInd>
      <TanningServicesProvidedInd>false</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>false</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>false</TransactionWithControlEntInd>
      <PoliticalCampaignActyInd>false</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>false</LobbyingActivitiesInd>
      <SchoolOperatingInd>false</SchoolOperatingInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>false</TrnsfrExmptNonChrtblRltdOrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
      <FiledScheduleAInd>true</FiledScheduleAInd>
    </IRS990EZ>
    <IRS990ScheduleA documentId="IRS990ScheduleA" softwareId="19009920" softwareVersionNum="2019v5.0">
      <PublicOrganization170Ind>X</PublicOrganization170Ind>
      <GiftsGrantsContriRcvd170Grp>
        <CurrentTaxYearMinus4YearsAmt>902931</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>1031384</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>767219</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>450609</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>98519</CurrentTaxYearAmt>
        <TotalAmt>3250662</TotalAmt>
      </GiftsGrantsContriRcvd170Grp>
      <TaxRevLeviedOrgnztnlBnft170Grp>
        <TotalAmt>0</TotalAmt>
      </TaxRevLeviedOrgnztnlBnft170Grp>
      <GovtFurnSrvcFcltsVl170Grp>
        <TotalAmt>0</TotalAmt>
      </GovtFurnSrvcFcltsVl170Grp>
      <TotalCalendarYear170Grp>
        <CurrentTaxYearMinus4YearsAmt>902931</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>1031384</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>767219</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>450609</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>98519</CurrentTaxYearAmt>
        <TotalAmt>3250662</TotalAmt>
      </TotalCalendarYear170Grp>
      <SubstantialContributorsTotAmt>2262737</SubstantialContributorsTotAmt>
      <PublicSupportTotal170Amt>987925</PublicSupportTotal170Amt>
      <GrossInvestmentIncome170Grp>
        <CurrentTaxYearMinus4YearsAmt>160</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>212</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>224</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>205</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>80</CurrentTaxYearAmt>
        <TotalAmt>881</TotalAmt>
      </GrossInvestmentIncome170Grp>
      <UnrelatedBusinessNetIncm170Grp>
        <TotalAmt>0</TotalAmt>
      </UnrelatedBusinessNetIncm170Grp>
      <OtherIncome170Grp>
        <TotalAmt>0</TotalAmt>
      </OtherIncome170Grp>
      <TotalSupportAmt>3251543</TotalSupportAmt>
      <PublicSupportCY170Pct>0.30380</PublicSupportCY170Pct>
      <PublicSupportPY170Pct>0.41000</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsPY170Ind>X</ThirtyThrPctSuprtTestsPY170Ind>
      <FactsAndCircumstancesTestTxt>Current Year Facts and Circumstances: From 2017 through 2022, VRISD scientists applied for 29 grants from the National Institutes of Health, several from the Department of Defense, and published 45 papers, over topics ranging from Alzheimers disease to prostate cancer. Obtaining funding has been very challenging, and we have not been funded by a public grant since 2017. The organization had hoped that funding from Pellficure Inc. would help bridge the gap between NIH and DOD grants. From the point of view of public benefit, Pellficure Inc. had defined research goals and many of the staff of VRISD worked toward accomplishing those goals, and findings from those studies have been published in publicly accessible literature, thereby accruing public benefit. That work focused on studying the properties of a natural product, plumbagin, that many scientists think may have therapeutic value in treating cancer. Pellficure has a limited intellectual property position regarding plumbagins use in treating prostate cancer. The basic science worked out along the way and published was not performed to support Pellficures property goals. The organization also worked on several projects unrelated to the objectives of Pellficure Inc., including a project to develop a gene signature for the adaptation of metastatic prostate cancer to bone marrow, for which a manuscript is under preparation, and which will serve as a grant application subject in the near future. The organization has also been working on a sequencing technology that was funded through 2017 by the National Cancer Center and will soon be advanced enough to request Phase II funding. While extensive efforts to achieve public funding during the Pellficure period were unsuccessful, the focus and emphasis continues to be to perform basic publicly funded research on important public health problems, and there are several projects in mid-stage development that will develop into NIH, NCI, and DOD grant applications this year, as well as possibly smaller funding sources.</FactsAndCircumstancesTestTxt>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="IRS990ScheduleB" softwareId="19009920" softwareVersionNum="2019v5.0">
      <ContributorInformationGrp>
        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorUSAddress>
        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
      </ContributorInformationGrp>
    </IRS990ScheduleB>
    <IRS990ScheduleO documentId="IRS990ScheduleO" softwareId="19009920" softwareVersionNum="2019v5.0">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.1005</FormAndLineReferenceDesc>
        <ExplanationTxt>Travel $18</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.1007</FormAndLineReferenceDesc>
        <ExplanationTxt>Conferences, Conventions, and Meetings $368</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.1008</FormAndLineReferenceDesc>
        <ExplanationTxt>Interest $298</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.1009</FormAndLineReferenceDesc>
        <ExplanationTxt>Depreciation $845</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.1012</FormAndLineReferenceDesc>
        <ExplanationTxt>Insurance $9615</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.1</FormAndLineReferenceDesc>
        <ExplanationTxt>PATENT, LEGAL &amp; TAXES $4559</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.2</FormAndLineReferenceDesc>
        <ExplanationTxt>SUPPLIES $4315</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.3</FormAndLineReferenceDesc>
        <ExplanationTxt>RELOCATION COSTS $3689</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.4</FormAndLineReferenceDesc>
        <ExplanationTxt>TELEPHONE $2676</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.5</FormAndLineReferenceDesc>
        <ExplanationTxt>LICENSES &amp; PERMITS $1040</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.6</FormAndLineReferenceDesc>
        <ExplanationTxt>ANIMAL COSTS $559</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.7</FormAndLineReferenceDesc>
        <ExplanationTxt>BANK &amp; CREDIT CARD FEES $46</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Assets.1005</FormAndLineReferenceDesc>
        <ExplanationTxt>Accounts Receivable - Beginning $25720 Accounts Receivable - Ending $12344</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Assets.1011</FormAndLineReferenceDesc>
        <ExplanationTxt>Prepaid Expenses and Deferred Charges - Beginning $3752 Prepaid Expenses and Deferred Charges - Ending $0</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Assets.1</FormAndLineReferenceDesc>
        <ExplanationTxt>DEPOSITS - Beginning $4912 DEPOSITS - Ending $4912</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Total Liabilities.1001</FormAndLineReferenceDesc>
        <ExplanationTxt>Accounts Payable and Accrued Expenses - Beginning $12594 Accounts Payable and Accrued Expenses - Ending $4673</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Total Liabilities.1</FormAndLineReferenceDesc>
        <ExplanationTxt>OTHER LIABILITIES - Beginning $19891 OTHER LIABILITIES - Ending $0</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>