The U.S. government failed to eliminate the virus on dairy farms when it was confined to a handful of states. Now at least 875 herds across 16 states have tested positive.

The rise of bird flu across farms in California has raised questions about the virus and its potential threat to humans.

The HPAI H5N1 virus has spread globally, infecting birds, mammals, and some humans. Most human cases are mild.

An estimated 200 snow geese discovered in parts of the Lehigh Valley are suspected by the Pennsylvania Game Commission to have died from bird flu. Test results are awaiting confirmation by the ...

Avian influenza has spread far beyond the nation's birds, infecting all manner of creatures from zoo animals, wild mammals, ...

A genetic analysis suggests the bird flu virus mutated inside a Louisiana patient who contracted the first severe case of the ...

First come the horseshoe crabs. Hoisting their round, tank-like shells, they trundle out of the Delaware Bay under the first ...

The bird flu virus was detected for the first time in U.S. dairy cows in March. According to the Centers for Disease Control, H5 bird flu is widespread in wild birds worldwide and is causing ...

a disease surveillance specialist in the Boston area, wondered how many other mysterious infections had gone undetected. Surveillance outside of farms was even patchier than on them, and bird flu ...

California declaring a public health emergency over bird flu, which hospitalized a British Columbia teenager for weeks. A fourth case of chronic wasting disease among deer. Tens of thousands of ...

Lyme disease and rabies. Bird flu — the H5N1 influenza strain — is a virus that wild birds like ducks and geese occasionally get sick with. The Lower Mainland sits smack dab in the middle of ...

Iowa — Farm groups are urging state officials to continue funding the development of livestock vaccines for bird flu and other foreign animal diseases like African Swine Fever and Food and Mouth ...