WHO recommended that quadrivalent vaccines for use in the 2021 - 2022 contain the following strains of the flu virus, as they predict that these strains will be the most prevalent across the northern hemisphere this flu season5:
Flu Refresher 2021
Annual flu vaccinations pt.2
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Annual flu vaccinations pt.2
WHO recommended that quadrivalent vaccines for use in the 2021 - 2022 contain the following strains of the flu virus, as they predict that these strains will be the most prevalent across the northern hemisphere this flu season5:
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