The World Health Organization (WHO) today announced the recommendations for the viral composition of influenza vaccines for the 2024-2025 influenza season in the northern hemisphere. The announcement was made at an information session after a 4-day m
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The World Health Organization (WHO) today announced the recommendations for the viral composition of influenza vaccines for the 2024-2025 influenza season in the northern hemisphere. The announcement was made at an information session after a 4-day meeting on the Composition of Influenza Virus Vaccines. The meeting is held twice annually, once for the southern and once for the northern hemisphere. WHO organizes these consultations with an advisory group of experts gathered from WHO Collaborating Centres and WHO Essential Regulatory Laboratories to analyse influenza virus surveillance data generated by the WHO Global Influenza Surveillance and Response System (GISRS). The recommendations issued are used by the national vaccine regulatory agencies and pharmaceutical companies to develop, produce, and license influenza vaccines for the following influenza season. The periodic update of viruses contained in influenza vaccines is necessary for the vaccines to be effective due to the cons
WHO ConsultationBackgroundThe 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.ObjectivesAnalyze 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 com