California Gov. Gavin Newsom declared a state of emergency in response to bird flu that's spreading among the state's dairy cows. The virus has already caused the deaths of more than 120 million birds ...

The move follows an April 24 federal order that mandated testing of certain dairy cattle before they could move between states and required reporting of any positive ... bird flu, mostly farm ...

The U.S. government failed to eliminate the virus on dairy farms when it was confined to a handful of states. Now at least ...

Humans infected with bird flu display a wide range of symptoms, from pneumonia requiring hospitalization to no symptoms at ...