Recommendations on influenza vaccine composition announced for the 2024-2025 influenza season in the Northern Hemisphere | Top Vip News

The World Health Organization (WHO) today announced recommendations for the viral composition of influenza vaccines for the 2024-2025 influenza season in the Northern Hemisphere. The announcement was made at a briefing after a four-day meeting on the composition of influenza virus vaccines. The meeting is held twice a year, once for the southern hemisphere and once for the northern hemisphere.

WHO organizes these consultations with an advisory group of experts gathered at WHO Collaborating Centers and WHO Essential Regulatory Laboratories to analyze influenza virus surveillance data generated by the Global Influenza Surveillance and Response System. (GISRS) of the WHO. The issued recommendations are used by national vaccine regulatory agencies and pharmaceutical companies to develop, produce, and license influenza vaccines for the upcoming influenza season.

Regular updating of viruses contained in influenza vaccines is necessary for vaccines to be effective due to the constantly evolving nature of influenza viruses, including those that circulate and infect humans.

The WHO recommends that trivalent The vaccines to be used in the 2024-2025 Northern Hemisphere influenza season contain the following:

Egg-based vaccines

  • a virus similar to A/Victoria/4897/2022 (H1N1)pdm09;
  • a virus similar to A/Thailand/8/2022 (H3N2); and
  • a virus similar to B/Austria/1359417/2021 (B/Victoria lineage).

Vaccines based on cell cultures or recombinants

  • a virus similar to A/Wisconsin/67/2022 (H1N1)pdm09;
  • a virus similar to A/Massachusetts/18/2022 (H3N2); and
  • a virus similar to B/Austria/1359417/2021 (B/Victoria lineage).

For quadrivalent recombinant or egg or cell culture-based vaccines for use in the 2024-2025 northern hemisphere influenza season, WHO recommends the inclusion of the following as a component of the B/Yamagata lineage:

  • a virus similar to B/Phuket/3073/2013 (B/Yamagata lineage).

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