Bird flu strain H5N9 reported for the first time in US Poultry

What is H5N9? US reports first bird flu strain outbreak in poultry U.S. authorities also identified the more common H5N1 strain on the same farm in Merced County, California. Newsweek

he United States has reported its first outbreak of H5N9 bird flu on a duck farm in California, according to the World Organization for Animal Health (WOAH) on Monday.

H5N9 is a rare subtype of the influenza A virus that can cause highly pathogenic avian influenza (HPAI), also known as bird flu. It's a reassortment strain that originated from the H5N1, H7N9, and H9N2 subtypes.

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