First Human Case of H5N1 Avian Flu Confirmed in Washington State Dairy Worker

A dairy worker in central Washington state has tested positive for highly pathogenic avian influenza (HPAI) H5N1 after exposure to infected cattle. This marks the first human case in Washington, occurring one week after the state confirmed H5N1 detections in dairy cows. The Yakima Health District announced the confirmed case on October 15, 2026, noting the individual has not experienced severe illness and is isolating at home. Officials state the risk to the general public remains low, with infections typically occurring through direct occupational contact with infected animals or contaminated environments.