The winter flu season features two types of influenza. Here's what you need to know about them and how they differ.

If you’re feeling under the weather but brushing it off as just a cold, you might consider taking a flu test.

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

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

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.

Flu cases had previously peaked this season at the very end of December. At week 52 —ending on December 28—the percentage of ...