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flag A new pneumonia vaccine shows strong protection in adults 50+, outperforming current options for 11 new strains.

flag Vaxcyte's Phase 1/2 trial of VAX-31, a 31-valent pneumococcal vaccine, showed strong immune responses in adults 50 and older, with the high dose matching or exceeding Prevnar 20 for 20 shared serotypes and outperforming it for 11 new ones. flag The vaccine was well-tolerated, with mild side effects and no serious adverse events. flag It met immunogenicity goals for all 31 serotypes, potentially offering broader protection against pneumonia and invasive disease than current vaccines. flag The high dose is now in a Phase 3 trial, with results expected in late 2026.

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