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

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

The numbers are posted weekly. That week, public health labs reported 4,377 viruses to the CDC, and 4,264 of them were the flu. According to the agency, there have been at least 24 million ...

Bird flu in house cats could pose a risk to public health A critical analysis of the seasonal flu selected for distribution through the CDC’s Health Alert Network has stalled, according to ...