Flu is hitting a second peak in the U.S. this season. A doctor shares what to know.

https://www.cbsnews.com/news/f....lu-second-peak-vacci

Flu is hitting a second peak in the U.S. this season. A doctor shares what to know. - CBS News
www.cbsnews.com

Flu is hitting a second peak in the U.S. this season. A doctor shares what to know. - CBS News

For a second time this season, at least 41 states are reporting high or very high levels of the flu. Heres how to stay safe.