At least four cattle herds in Nevada have tested positive for a strain of H5N1 bird flu never before seen in cows, state ...

The finding indicates that the virus, known as H5N1, has spilled from birds into cows at least twice — leading to these two ...

What you need to know about bird flu. Public health experts are closely watching avian influenza, which has affected chickens ...

The U.S. Department of Agriculture has detected a bird flu strain in dairy cattle that previously had not been seen in cows, ...

Bird flu has decimated poultry flocks and infected cattle herds. The risk to humans is currently low, but that could easily ...