It's an unusual winter for respiratory illnesses. The flu is peaking twice: once in early January and again in February.

A new variant of H5N1 bird flu, known as D1.1, has been detected in dairy cattle in Nevada. This marks the first time this ...

Experts said it raises new questions about wider spread and the difficulty of controlling infections in animals and the people who work closely with them.

The new H5N1 version, known as D1.1, was found in dairy cattle in Nevada and is different than the B3.13 type that has spread ...

Dairy cows in Nevada have been infected with a new strain of bird flu virus different from the one circulating in other herds ...

REDWOOD CITY — A stray cat in San Mateo County recently tested positive for bird flu, officials said Thursday. The case is ...

Dairy cattle in Nevada have been infected with a new type of bird flu that's different from the version that has spread in ...

Senator Cory Booker and Representative Rosa DeLauro introduced a bill to provide FDA the authority to collect microbial ...

U.S. dairy cattle tested positive for a strain of bird flu that previously had not been seen in cows, the U.S. Department of ...

The Milwaukee County Zoo has closed its aviary for the "foreseeable future" in an attempt to protect its birds from the bird ...

A branch of the H5N1 bird flu family tree that hadn't previously been seen in cattle has now been detected in dairy cows.