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

The Centers for Disease Control and Prevention reports that flu cases in the United States this season are at their highest ...

Levels of influenza nationwide are now at the highest they have been since the peak of the 2009 swine flu pandemic, according ...

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

Doctor visits for flu symptoms are at a 15-year high. Why is this flu season so bad? Doctors discuss flu trends, symptoms and ...

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

The US is battling its worst flu season in 15 years with 24 million infections and 13000 deaths Schools are shutting down as ...

Interactions Between Flu Subtypes Predict Epidemic Severity More Than Virus ... and last longer than vaccines currently in ... 'Swine Flu' Strain Has Passed from Humans to Swine Nearly 400 Times ...

Influenza A — a nasty flu strain that fueled the 2009 flu epidemic — has been landing Ohioans in the hospital since the ...