
Vaxcyte Begins Phase 3 Trial of VAX-31 Pneumococcal Vaccine in Adults

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Vaxcyte Inc. has initiated the OPUS Phase 3 trial for its VAX-31 pneumococcal vaccine, targeting invasive pneumococcal disease and pneumonia in adults. The trial will enroll 4,000 participants and compare VAX-31 to existing vaccines Capvaxive and Prevnar 20. Results are expected in late 2026, with further studies planned for 2026-2027. This AI-generated news is informational and not financial advice.
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