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WHO Consultation on the Composition of Influenza Virus Vaccines for Use in the 2025 Southern Hemisphere Influenza Season [1]
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Date: 2024-09-23
WHO Consultation
Background
The periodic replacement of viruses contained in influenza vaccines is necessary in order for the vaccines to be effective due to the constant evolving nature of influenza viruses, including those circulating and infecting humans.
Twice annually, WHO organizes consultations with an advisory group of experts to analyze influenza virus surveillance data generated by the WHO Global Influenza Surveillance and Response System (GISRS), and issues recommendations on the composition of the influenza vaccines for the following influenza season. These recommendations are used by the national vaccine regulatory agencies and the pharmaceutical companies to develop, produce and license influenza vaccines.
Objectives
Analyze the antigenic and genetic characteristics of seasonal influenza viruses circulating and infecting humans, taking into consideration the available epidemiological and clinical information from individual countries and regions;
Make recommendations on the composition of influenza virus vaccines for use in the 2025 southern hemisphere influenza season; and
Review the antigenic and genetic characteristics of recent A(H5/H9) and other subtype or variant zoonotic influenza viruses) that the WHO Collaborating Centres of the GISRS received and the need to develop new candidate vaccine viruses for pandemic preparedness purposes.
Participants (by invitation)
Representatives from WHO Collaborating Centres for influenza (CCs) of GISRS;
Representatives from WHO Essential Regulatory Laboratories (ERLs) of GISRS;
Representatives from National Influenza Centres and WHO H5 Reference Laboratories of GISRS;
Representatives from the WHO Collaborating Centre for Modelling, Evolution, and Control of Emerging Infectious Diseases;
Representatives from the FAO/WOAH network of expertise on animal influenza (OFFLU); and
Other subject matter experts.
Provisional main agenda items
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[1] Url:
https://www.who.int/news-room/events/detail/2024/09/23/default-calendar/who-consultation-on-the-composition-of-influenza-virus-vaccines-for-use-in-the-2025-southern-hemisphere-influenza-season
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