Dairy cows in Nevada have been infected with a second version of the avian influenza virus that is different from the one rampaging through herds since the spring, Agriculture Department officials ...

A new version of the virus, known as D1.1, was confirmed in Nevada, the USDA said. It was detected in milk collected as part of a surveillance program. At least 67 people in the U.S. have been ...

A new variant of the H5N1 bird flu — the same one that led to the death of a Louisiana man — has for first the first time ...