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 activity remains "elevated" in the U.S. but is starting to show signs of abating, according to new CDC data published Friday. A look at the numbers behind peak flu season during the month of ...

Only about 45% of adults and children got their flu shot this season, CDC data shows, well below the federal target of 70%.

One of the worst flu seasons in years has reached its peak and is improving, officials with the Centers for Disease Control ...

The flu season has reached its peak, according to new data from the Atlanta-based CDC. This comes just weeks after CDC data ...

Only about 45% of adults and children got their flu shot this season, CDC data shows, well below the federal target of 70%. Sign up here to get The Results Are In with Dr. Sanjay Gupta every ...