The U.S. winter virus season is in full force, and by one measure is the most intense in about 15 years. One indicator of flu ...

San Mateo County public health officials reported finding H5N1 bird flu in a pet cat and a backyard poultry flock.

The CDC allegedly posted and swiftly deleted data suggesting bird flu could spread from cats to people in a table included in ...

More than 156 million chickens, ducks, turkeys and other fowl have been slaughtered across the United States since the ...

Schools around the U.S. are closing due to surges of flu and other illnesses which are sickening students and staff. Here's what parents need to know.

South Carolina is one of a handful of states with the highest number of flu cases in the United States, according to data ...

(NEXSTAR) – The flu is spreading far and wide across the U.S. – and influenza A is largely to blame. Of all the flu tests reported to the Centers for Disease Control and Prevention since the start of ...

Flu A and flu B are two different strains of influenza, explains Thomas Russo, M.D., professor and chief of infectious ...

While we often refer to it as "the flu," the influenza virus has several strains, with flu A and flu B considered the most ...

For the week ending Jan. 25, seasonal flu activity remains high and increasing. Clinical laboratories tested 129,378 ...

It's flu season right now, and the U.S. is in the midst of a wave that's straining hospitals. But not all influenza is the same.

On the CDC's flu activity map, at least 41 states are shades of red which reflects high or very high activity, including ...