Vaxcyte Completes Enrollment of Phase 2 Study Evaluating VAX-24 for the Prevention of Invasive Pneumococcal Disease (IPD) in Infants

-- Company Expects to Announce Topline Safety, Tolerability and Immunogenicity Data from Primary Immunization Series by the End of the First Quarter of 2025, Followed by Topline Data from Booster Dose by the End of 2025 --

-- VAX-24, a 24-Valent Pneumococcal Conjugate Vaccine (PCV), is Designed to Cover More Serotypes Than Any Infant Pneumococcal Vaccine On-Market or in U.S. Clinics Today --

-- Company’s Potential Best-in-Class, Carrier-Sparing PCV Programs, VAX-24 and VAX-31, Intended to Deliver the Broadest-Spectrum of Coverage Against IPD --

SAN CARLOS, Calif., March 04, 2024 (GLOBE NEWSWIRE) -- Vaxcyte, Inc. (Nasdaq: PCVX), a clinical-stage vaccine innovation company engineering high-fidelity vaccines to protect humankind from the consequences of bacterial diseases, today announced the completion of enrollment in its Phase 2 study evaluating VAX-24, a broad-spectrum, carrier-sparing 24-valent pneumococcal conjugate vaccine (PCV) candidate designed to prevent invasive pneumococcal disease (IPD), in healthy infants. Vaxcyte expects to announce topline safety, tolerability and immunogenicity data from the Phase 2 study primary three-dose immunization series by the end of the first quarter of 2025, followed by topline data from the booster dose by the end of 2025.

“Completing enrollment of the VAX-24 study with more than 800 healthy infants demonstrates yet another significant milestone in the development of our VAX-24 and VAX-31 PCV candidates,” said Grant Pickering, Chief Executive Officer and Co-founder of Vaxcyte. “We believe VAX-24 has a potential best-in-class profile for this vital population and is designed to cover more serotypes than any infant pneumococcal vaccine on-market or in U.S. clinics today. We look forward to announcing the expected topline safety, tolerability and immunogenicity data from the primary immunization series by the end of the first quarter of 2025, which will follow participants receiving all three doses in this series, as well as the serology and data analsysis.”

“Despite the effectiveness of current vaccines, IPD, which includes meningitis and bacteremia, remains persistent in the first years of life and is a leading cause of invasive disease in children two years of age and under,” said Jim Wassil, Executive Vice President and Chief Operating Officer of Vaxcyte. “Given the significant burden of disease in young children, there remains a need for broader-spectrum vaccines like VAX-24 and VAX-31, our next-generation 31-valent PCV candidate, that are designed to provide greater protection than the current standard-of-care.”