Europe – EU recommendations for 2023-2024 seasonal flu vaccine composition

EMA has issued the recommendations for the influenza virus strains that vaccine manufacturers should include in vaccines for the prevention of seasonal influenza from autumn 2023.

Manufacturers of egg-based or live attenuated quadrivalent vaccines for the 2023-2024 season should include these three virus strains:

  • an A/Victoria/4897/2022 (H1N1)pdm09-like virus;
  • an A/Darwin/9/2021 (H3N2)-like virus; and
  • a B/Austria/1359417/2021 (B/Victoria lineage)-like virus.

Manufacturers of cell-based quadrivalent vaccines for the 2023-2024 season should include these three virus strains:

  • an A/Wisconsin/67/2022 (H1N1)pdm09-like virus;
  • an A/Darwin/6/2021 (H3N2)-like virus; and
  • a B/Austria/1359417/2021 (B/Victoria lineage)-like virus…