WHO recommends influenza vaccine composition for 2027 southern season
WHO announced recommended viral components for influenza vaccines intended for the 2027 southern hemisphere season, following an international consultation.
Source review period: 2026-09-25
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WHO announced recommended viral components for influenza vaccines intended for the 2027 southern hemisphere season, following an international consultation.
For egg-based vaccines, WHO recommended A/Missouri/11/2025 (H1N1)pdm09-like, A/Darwin/1454/2025 (H3N2)-like and B/Tokyo/EIS13-175/2025 (B/Victoria lineage)-like viruses. Cell culture, recombinant protein or nucleic acid vaccines share the H1N1 component; the other recommendations are A/Darwin/1415/2025 (H3N2)-like and B/Pennsylvania/14/2025 (B/Victoria lineage)-like viruses.
WHO makes recommendations twice a year after experts review surveillance through the Global Influenza Surveillance and Response System and other sources. From February to August 2026, A(H1N1)pdm09, A(H3N2) and B viruses circulated in varying proportions.
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WHO recommends influenza vaccine composition for 2027 southern season
WHO announced recommended viral components for influenza vaccines intended for the 2027 southern hemisphere season, following an international consultation.
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The timeline records the source publication date of the health announcement; it infers no separate implementation date or outcome.
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