New versions of the H5N1 virus are increasingly adept at spreading. Suggestions to either let it rip in poultry or vaccinate the birds could backfire.

In a major win for the nation's biosecurity efforts, Australia has been officially declared free from high pathogenicity ...

The U.S. Centers for Disease Control and Prevention said on Monday it has ended its emergency response for H5N1 bird flu, ...

The U.S. Centers for Disease Control and Prevention has merged H5N1 bird flu updates with routine updates for seasonal ...