The widening U.S. bird flu outbreak has made its way to Maryland, which has counted two cases on commercial poultry farms — one in Caroline County and another in Queen Anne’s County — since

H5N1, or bird flu, poses a limited risk to humans but remains a serious threat. Learn how it spreads, its symptoms, and key precautions to prevent infection.

A commercial turkey operation in Sampson County, North Carolina, has tested positive for High Path Avian Influenza.

The United States reported a first outbreak of H5N9 bird flu on a poultry farm, the World Organisation for Animal Health said on Monday. Highly pathogenic avian influenza, commonly called bird flu, has spread around the globe in the past years,

Both H5N9 and H5N1 strains of avian flu were identified through tests by the US Department of Agriculture's National Veterinary Services Laboratory (USDA NVSL), after the outbreak was first detected last November.

A new strain of H5N9 bird flu was detected at a commercial duck operation in California's Merced County. All the ducks were euthanized.

The H5N9 strain of avian influenza is much more rare than the H5N1 which has been responsible for most of the reported human cases and the first human death.