Illinois is seeing a "notable increase" in hospital admissions for flu cases, according to state health officials, as levels of respiratory viruses continue to tick up. But which type of flu is ...

Health officials have confirmed the presence of H5N1 (bird flu) in a backyard poultry flock in San Mateo County. The county said that while there are no current human cases of bird ...

A branch of the H5N1 bird flu family tree that hadn't previously been seen in cattle has now been detected in dairy cows.

U.S. dodged a bird flu pandemic in 1957 thanks to eggs and dumb luck – with a new strain spreading fast, will Americans get ...