Doctor's visits for flu symptoms are at a 15-year high. Why is this flu season so bad? Doctors discuss flu severity, symptoms and how to stay safe.

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

Data on flu test positivity and Tamiflu prescription fills show that influenza activity has already surpassed the past 7 ...

I’m not in any way minimizing the great work the CDC does. But I think most of us realize that it has to be approved by the ...

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