Review of global influenza circulation, late 2019 to 2020, and the impact of the COVID-19 pandemic on influenza circulation – WHO European Region, 2005–2019 – Bilan de la circulation mondiale de la grippe entre fin 2019 et fin 2020 et effets de la pandémie de COVID-19 sur la circulation de la grippe
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The World Health Organization (WHO) is the directing and coordinating authority for health within the United Nations system.