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

There are currently 43 states across the U.S. reporting high or very high flu activity, with some forcing to close schools ...

Partial CDC data suggest that influenza deaths may have already reached as high as 2% of deaths for the week ending on Feb. 1 ...

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

Influenza is surging in the U.S., with doctor visits for flu symptoms at a 15-year high. Why is this flu season so bad?

Influenza cases continue to mount with the virus reaching activity levels in the U.S. not seen for the last 15 years, ...

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

So far this flu season, the CDC has reported at least 24 million flu cases in the U.S. That's resulted in around 310,000 hospitalizations and 13,000 deaths. Historically speaking, the month of ...

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.

NEW YORK (AP) — The U.S. winter virus season is in full force, and by one measure is the most intense in 15 years.

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