Washington Reports First Human Case of H5N5 Bird Flu
Washington state health officials confirmed Friday that a resident has contracted a rare strain of bird flu, marking the nation’s first human case of avian influenza since February. According to The Associated Press …

Washington state health officials confirmed Friday that a resident has contracted a rare strain of Bird flu, marking the nation’s first Human case of avian influenza since February.
According to The Associated Press, the older adult, who has underlying health conditions, remains hospitalized. Preliminary testing announced Thursday identified the infection, and follow-up testing confirmed the diagnosis on Friday.
State and federal authorities said the virus is H5N5, a strain not previously seen in humans. “This appears to be the first known human infection with the H5N5 Bird flu virus,” officials said.
Experts emphasized that the new strain does not appear to pose a greater threat to human health than H5N1, the virus responsible for about 70 reported U.S. human infections in 2024 and 2025. Most of those cases were mild and occurred in workers on dairy and poultry farms.
“These viruses behave similarly,” said Richard Webby, a flu researcher at St. Jude Children’s Research Hospital in Memphis, Tennessee. “My gut instinct is to consider it the same as H5N1 from a human health perspective.”



