Epidemiological Update - Avian Influenza A(H5N1) in the Americas Region - 4 March 2025

Since 2022 and as of epidemiological week (EW) 8 of 2025, a total of 19 countries and territories in the Americas Region reported 4,713 animal outbreaks of avian influenza A(H5N1) to the World Organization for Animal Health (WOAH), representing 325 additional outbreaks, since the last epidemiological update published by the Pan American Health Organization/World Health Organization (PAHO/WHO) on 24 January 2025.

A total of 74 human infections caused by avian influenza A(H5) have been reported in four countries in the Americas between 2022 and 25 February 2025, with three additional cases reported since the last epidemiological update published by PAHO/WHO.