More than 24 million people have had seasonal flu this season, according to estimates from the Centers for Disease Control ...

A second subtype of H5 bird flu, known as D1.1, was detected in dairy cattle and infected one worker in the US state of ...

Eleven states are experiencing very high levels of flu and some schools have been closed by the burden on students and staff.

Outpatient health care visits for flu illnesses are at their highest levels in 15 years, according to data updated Friday by ...

One in every three flu tests came back positive last week, according to the Centers for Disease Control and Prevention.

The newer strain had been seen before in more than a dozen people exposed to poultry, but this is the first time an infection ...

There have been an estimated 24 million flu illnesses, 310,000 hospitalizations and 13,000 deaths so far this season — but ...

As of Feb. 5, bird flu was confirmed in 959 dairy herds in 16 states. How is Wisconsin faring as the strain enters fourth year?

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

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

Influenza A, also known as the flu, is “everywhere,” says Dr. Michelle Barron, senior medical director of infection ...