Recommended composition of influenza virus vaccines for use in the 2026-2027 northern hemisphere influenza season

Overview

For vaccines for use in the 2026-2027 northern hemisphere influenza season, WHO recommends the following: 

 Egg-based vaccines

• an A/Missouri/11/2025 (H1N1)pdm09-like virus;

• an A/Darwin/1454/2025 (H3N2)-like virus; and

• a B/Tokyo/EIS13-175/2025 (B/Victoria lineage)-like virus. 

Cell culture-, recombinant protein- or nucleic acid-based vaccines 

• an A/Missouri/11/2025 (H1N1)pdm09-like virus;

• an A/Darwin/1415/2025 (H3N2)-like virus; and 

• a B/Pennsylvania/14/2025 (B/Victoria lineage)-like virus.