Europe – EU recommendations for 2021-2022 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 2021.

Manufacturers of egg-based or live attenuated trivalent vaccines for the 2021/2022 season should include these three virus strains:

  • an A/Victoria/2570/2019 (H1N1)pdm09-like virus;
  • an A/Cambodia/e0826360/2020 (H3N2)-like virus;
  • a B/Washington/02/2019 (B/Victoria lineage)-like virus

Manufacturers of cell-based trivalent vaccines for the 2021/2022 season should include these three virus strains:

  • an A/Wisconsin/588/2019 (H1N1)pdm09-like virus;
  • an A/Cambodia/e0826360/2020 (H3N2)-like virus;
  • a B/Washington/02/2019 (B/Victoria lineage)-like virus

For quadrivalent vaccines with two influenza B viruses, a B/Phuket/3073/2013-like virus should be added to the strains mentioned above…