Health

First Human Avian Influenza Case Confirmed in US – H5N5 Strain

First human Case of H5N5 Avian Influenza Confirmed in Washington State Washington state health authorities have confirmed the first human infection with the H5N5 avian influenza virus, a strain that until now had only been detected in animals.

By Dr Natalie Singh - Health Editor Updated November 19, 2025

First Human Avian Influenza Case Confirmed in US – H5N5 Strain

First human Case of H5N5 Avian Influenza Confirmed in Washington State

Washington state health authorities have confirmed the first human infection with the H5N5 avian influenza virus, a strain that until now had only been detected in animals.

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About the author: Dr Natalie Singh - Health Editor

Board‑certified internal‑medicine physician and MPH. Natalie authored peer‑reviewed studies on infectious disease and served as medical editor. “Dr. Natalie Singh delivers evidence‑based health news, medical breakthroughs, and expert wellness guidance.”