All of the state's cases have been linked to contact with infected dairy cows, officials said. No human-to-human transmission has been documented.

Bird flu is presumed to have infected four poultry workers in Washington state, making it the sixth U.S. state to identify ...

Bird flu is presumed to have infected four poultry workers in Washington state, making it the sixth U.S. state to identify ...

Dr. Denisse Vega Ocasio of the Centers for Disease Control and Prevention discusses how people can reduce their risk of ...

Washington state health officials are investigating after four agricultural workers tested presumptively positive for bird ...

Containing a potential H5N1 pandemic would depend on how rapidly a vaccine targeted to the emergent strain can be ...

Washington state health officials are investigating after four agricultural workers tested presumptively positive for bird ...

For birds, eagles and condors are beloved poster children of environmental movements. But for gulls — sometimes erroneously ...

Health officials are sounding the alarm as new cases of bird flu are now popping up in humans and commercial dairy farms.

Cows in California are dying at much higher rates from bird flu than in other affected states, industry and veterinary ...

Bird flu has infected a flock at a farm in Franklin County. This is the first detection of the highly contagious virus in ...

France has raised its risk level of bird flu to 'moderate' from 'negligible', it said in a decree published in the official ...