• Based on the Strength of Unprecedented Results from the Positive Phase 1/2 Study in Adults Aged 50 and Older, Vaxcyte Advanced VAX-31 High Dose into Comprehensive Phase 3 Adult Program; Topline Data from the OPUS-1 Pivotal Noninferiority Trial Expected in the Fourth Quarter of 2026
  • At All Doses Studied, VAX-31 Demonstrated Robust Opsonophagocytic Activity and Immunoglobulin G Immune Responses for All 31 Serotypes and Was Observed to be Well Tolerated with a Safety Profile Similar to Prevnar 20®
  • Results Further Validate Potential of Vaxcyte's Carrier-Sparing Platform to Deliver Broadest-Spectrum PCV Candidates that Provide Protection Against Both Currently Circulating and Historically Prevalent Serotypes
  • VAX-31 is Designed to Cover ~95% of Invasive Pneumococcal Disease (IPD) and ~88% of Pneumococcal Pneumonia in U.S. Adults Aged 50 and Older, with Potential to Provide an Incremental 14-34% Broader IPD Coverage and 19-31% Broader Pneumonia Coverage than Standard-of-Care Vaccines