On February 5, the US Department of Agriculture said dairy cattle in the United States had tested positive for a particular strain of bird flu that was not previously found in cows.

The virus is spreading with greater speed among animals, with transmission to humans increasing. But risk to the general ...

Amid rising respiratory illnesses, a CDC report reveals undetected bird flu cases in US veterinarians. The spread, shown ...

Yahoo News provides the latest updates on the spread of bird flu in the U.S. and its effect on rising egg prices and ...

A new strain of avian flu, H5N1, has spread to dairy cows and domestic cats in the U.S., with a dairy worker in Nevada ...

With so much H5N1 circulating in the U.S., scientists worry we are a few mutations away from a potential human pandemic.