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Vaxart Completes Enrollment of Sentinel Cohort in Phase 2b Study Evaluating Its COVID-19 Oral Pill Vaccine Candidate

VXRT 12.02.2024

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SOUTH SAN FRANCISCO, Calif.,Dec. 02, 2024(GLOBE NEWSWIRE) --Vaxart, Inc.(Nasdaq: VXRT) today announced completion of enrollment of the sentinel cohort of a Phase 2b clinical trial evaluating Vaxart’s oral pill COVID-19 vaccine candidate against an approved mRNA vaccine comparator. The sentinel cohort comprised of 400 participants, with 200 receiving Vaxart’s COVID-19 vaccine candidate and 200 receiving an approved mRNA vaccine comparator.

“We are pleased to complete the enrollment of the sentinel cohort, an important milestone that reflects the collaboration of our entire team, as well as the trust and commitment of the participants and investigators involved,” said Dr.James F. Cummings, Vaxart’s Chief Medical Officer. “We look forward to DSMB and FDA review followed by the planned initiation of the Phase 2b trial’s second portion. Our continued progress brings us closer to our goal of potentially demonstrating advantages of our mucosal technology against an approved mRNA vaccine.”

An independent Data and Safety Monitoring Board (DSMB) and theU.S. Food and Drug Administration(FDA) will review 30-day safety data from the sentinel cohort.

Upon favorable review by the DSMB and FDA, the study will progress afterBiomedical Advanced Research and Development Authority(BARDA) approval to the second part of the trial by enrolling approximately 10,000 participants. The trial will strive to enroll participants in line withU.S.demographics, as well as including at least 25% over the age of 65.

The Phase 2b trial is a double-blind, multi-center, randomized, comparator-controlled study to determine the relative efficacy, safety, and immunogenicity of Vaxart’s oral pill COVID-19 vaccine candidate against an approved mRNA COVID-19 injectable vaccine in adults previously immunized against COVID-19 infection.

The full Phase 2b trial will measure efficacy for symptomatic and asymptomatic disease, systemic and mucosal immune induction, and the incidence of adverse events. The primary endpoint is relative efficacy of Vaxart’s COVID-19 vaccine candidate compared to an approved mRNA comparator for the prevention of symptomatic disease. Primary efficacy analysis will be performed when all participants have either discontinued or completed a study visit 12 months post-vaccination.

Funding for this award was received under Project NextGen, a$5 billioninitiative led by BARDA and theNational Institute of Allergy and Infectious Diseases(NIAID) to accelerate and streamline the development of the next generation of innovative COVID-19 vaccines, therapeutics, and enablers. Vaxart’s project award through the Rapid Response Partnership Vehicle (RRPV) is valued at up to$456 million. This project has been funded with federal funds from theU.S. Department of Health and Human Services(HHS); Administration for Strategic Preparedness and Response (ASPR); BARDA, under Other Transaction (OT) number 75A50123D00005.

As a pioneer of oral vaccines,Vaxartwas the firstU.S.company to complete a Phase 2 clinical trial of an oral vaccine for COVID-19.

AboutVaxartVaxartis a clinical-stage biotechnology company developing a range of oral recombinant vaccines based on its proprietary delivery platform.Vaxartvaccines are designed to be administered using pills that can be stored and shipped without refrigeration and eliminate the risk of needle-stick injury.Vaxartbelieves that its proprietary pill vaccine delivery platform is suitable to deliver recombinant vaccines, positioning the company to develop oral versions of currently marketed vaccines and to design recombinant vaccines for new indications. Vaxart’s development programs currently include pill vaccines designed to protect against coronavirus, norovirus and influenza, as well as a therapeutic vaccine for human papillomavirus (HPV), Vaxart’s first immune-oncology indication.Vaxarthas filed broad domestic and international patent applications covering its proprietary technology and creations for oral vaccination using adenovirus and TLR3 agonists.

Note Regarding Forward-Looking StatementsThis press release contains forward-looking statements that involve substantial risks and uncertainties. All statements, other than statements of historical facts, included in this press release regardingVaxart'sstrategy, prospects, plans and objectives, results from preclinical and clinical trials and the timing of such results, commercialization agreements and licenses, and beliefs and expectations of management are forward-looking statements. These forward-looking statements may be accompanied by such words as "should," "believe," "could," "potential," "will," "expected," “anticipate,” "plan," and other words and terms of similar meaning. Examples of such statements include, but are not limited to, statements relating toVaxart'sability to develop and commercialize its product candidates, including its vaccine booster products;Vaxart'sexpectations regarding clinical results and trial data, and the timing of receiving and reporting such clinical results and trial data; andVaxart'sexpectations with respect to the effectiveness of its product candidates.Vaxartmay not actually achieve the plans, carry out the intentions, or meet the expectations or projections disclosed in the forward-looking statements, and you should not place undue reliance on these forward-looking statements. Actual results or events could differ materially from the plans, intentions, expectations, and projections disclosed in the forward-looking statements. Various important factors could cause actual results or events to differ materially from the forward-looking statements thatVaxartmakes, including uncertainties inherent in research and development, including the ability to meet anticipated clinical endpoints, commencement, and/or completion dates for clinical trials, regulatory submission dates, regulatory approval dates, and/or launch dates, as well as the possibility of unfavorable new clinical data and further analyses of existing clinical data; the risk that clinical trial data are subject to differing interpretations and assessments by regulatory authorities; whether regulatory authorities will be satisfied with the design of and results from the clinical studies; decisions by regulatory authorities impacting labeling, manufacturing processes, and safety that could affect the availability or commercial potential of any product candidate, including the possibility thatVaxart'sproduct candidates may not be approved by the FDA or non-U.S.regulatory authorities; that, even if approved by the FDA or non-U.S.regulatory authorities,Vaxart'sproduct candidates may not achieve broad market acceptance; that aVaxartcollaborator may not attain development and commercial milestones; thatVaxartor its partners may experience manufacturing issues and delays due to events within, or outside of,Vaxart'sor its partners' control; difficulties in production, particularly in scaling up initial production, including difficulties with production costs and yields, quality control, including stability of the product candidate and quality assurance testing, shortages of qualified personnel or key raw materials, and compliance with strictly enforced federal, state, and foreign regulations; thatVaxartmay not be able to obtain, maintain, and enforce necessary patent and other intellectual property protection; thatVaxart'scapital resources may be inadequate;Vaxart'sability to resolve pending legal matters;Vaxart'sability to obtain sufficient capital to fund its operations on terms acceptable toVaxart, if at all; the impact of government healthcare proposals and policies; competitive factors; and other risks described in the "Risk Factors" sections ofVaxart'sQuarterly and Annual Reports filed with theSEC.Vaxartdoes not assume any obligation to update any forward-looking statements, except as required by law.

Contact

Vaxart Media and Investor Relations:Matt SteinbergFINN PartnersIR@vaxart.com(646) 871-8481

Source: Vaxart, Inc.

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Vaxart Completes Enrollment of Sentinel Cohort in Phase 2b Study Evaluating Its COVID-19 Oral Pill Vaccine Candidate

VXRT 12.02.2024

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