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

Nearly 50,000 people have been hospitalized during this year's flu season, and experts say we haven't seen this many cases ...

Influenza levels in the US are the highest they've been in 15 years amid winter weather and a second wave of the virus.

Flu cases are surging this winter—this season is no joke. New data from the Centers for Disease Control and Prevention ...

Cases of the seasonal flu in the U.S. have reached their highest numbers in more than a decade, according to the Centers for Disease Control and Prevention.

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

Testing results from patients indicate that two strains of seasonal flu that are causing most illnesses — a Type A H1N1 and a ...

This year’s flu season is the most intense in at least 15 years by one measure — the activity at doctors’ offices and clinics ...

The flu vaccine is developed using data monitored from around the world to predict what the most common strain will be. The ...

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