While the H5N1 bird flu keep spreading, the first reported H5N9 outbreak in the United States has been identified on a duck ...

Nearly 119,000 birds have been culled at a farm in California after a bird flu called H5N9 was detected among the poultry.

A new antibody therapy effectively protects monkeys from severe H5N1 avian flu, offering hope for a universal flu vaccine and ...

H5N1 avian influenza continues to spread amid commercial and backyard poultry, and additional cases have been reported in ...

The Centers for Disease Control and Prevention are monitoring the bird flu situation in the United States. Here's what to ...

Global outbreak of Avian Influenza H5N1 in birds, spreading to cattle and humans, raising concerns for potential evolution ...

The highly contagious bird flu has hit Montgomery County, Maryland, where officials say a backyard flock of chickens tested ...

The progression of the species-jumping disease has been unprecedented, including the first-ever U.S. cases of infections in ...

"Cats (domestic and large felids) in particular can experience severe illness or death from infection with H5N1. Dogs can also contract H5N1, although they usually exhibit mild clinical signs and low ...

The California duck farm's strain of H5N9 is different from those earlier cases because this time it is closely related to a ...

The number of bird flu cases in Central Massachusetts is relatively low, compared to a swath of the state that runs from ...

Wisconsin is among 10 states to report human cases of the H5N1 virus so far, with more than half reported in California.