WHO announces recommended viral composition for 2025 influenza vaccines

· News-Medical

The periodic update of viruses contained in influenza vaccines is necessary for the vaccines to be effective due to the constant evolving nature of influenza viruses, including those circulating and infecting humans.

  • an A/Victoria/4897/2022 (H1N1)pdm09-like virus;
  • an A/Croatia/10136RV/2023 (H3N2)-like virus; and
  • a B/Austria/1359417/2021 (B/Victoria lineage)-like virus.

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

  • an A/Wisconsin/67/2022 (H1N1)pdm09-like virus;
  • an A/District of Columbia/27/2023 (H3N2)-like virus; and
  • a B/Austria/1359417/2021 (B/Victoria lineage)-like virus.

The recommendation for the B/Yamagata lineage component of quadrivalent influenza vaccines remains unchanged from previous recommendations:

  • a B/Phuket/3073/2013 (B/Yamagata lineage)-like virus.

Source:

The World Health Organization