California officials have declared a state of emergency over the spread of bird flu, which is tearing through dairy cows in that state and causing sporadic illnesses in people in the U.S. That raises new questions about the virus, which has spread for ...

Gov. Gavin Newsom’s declaration has riled up concern, particularly in other top dairy-producing states, such as Wisconsin and Pennsylvania.

Bird flu virus has swept through farms across the nation’s largest dairy producing state. All human cases had been mild - until now.

A fast-growing outbreak of avian flu has upended California’s dairy industry, the nation’s largest producer of milk, infecting most of the state’s herds and putting thousands of farmworkers at risk for contracting the virus.

California declared a state of emergency this week over the spread of bird flu in the state as the virus continues to be detected among the state’s cattle herds. California Gov. Gavin Newsom (D) said in a statement Wednesday that the declaration of an emergency is meant to “ensure government agencies have the resources

The declaration of a state of emergency in California over avian influenza comes within days of the first severe human case of bird flu in the U.S.

California Gov. Gavin Newsom declared a public health emergency on Wednesday as bird flu continues to spread among the state's dairy cattle.

More than 4 million chickens and turkeys have been killed across California in an attempt to stop the virus from spreading.

California officials have declared a state of emergency over the spread of bird flu, which is tearing through dairy cows in that state and causing sporadic illnesses in people in the U.S.

At least 61 people in the US have contracted bird flu amid outbreaks in poultry and dairy cows. What are the symptoms? What to know about highly pathogenic avian influenza, aka, H5N1.