“The World Health Organization has announced the recommended viral composition of influenza vaccines for the 2023 southern hemisphere influenza season. The recommendations issued today will be used by 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 constantly evolving nature of influenza viruses.The year-round surveillance is conducted by GISRS, a global network of over 150 laboratories in 127 countries, areas or territories set up in 1952.  This year we celebrate its 70th anniversary.”

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