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

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

More than 24 million people have had seasonal flu this season, according to estimates from the Centers for Disease Control ...

That is the worst on record in the CDC's influenza surveillance network since late 2009, during the swine flu pandemic. While most flu seasons usually see a resurgence of infections after the ...

During the week ending Feb. 1, 8% of emergency department visits were due to flu compared with 3.2% the same time last year, according to the CDC data. Additionally, 31.6% of tests came back ...

The Centers for Disease Control and Prevention says hospitals treating people for the flu should test them for avian ...

As cases of H5N1, also known as avian flu or bird flu, continue to surface across the U.S., safety precautions are ramping up. The U.S. Centers for Disease Control and Prevention (CDC) announced ...

(NEXSTAR) – The map of flu activity across the United States continues to darken, both figuratively and literally, as case ...

Flu cases have been surging across the United States, according to the latest estimates of the US Centers for Disease Control and Prevention (CDC) released on Friday. There have been at least 24 ...

The Centers for Disease Control and Prevention resumed publishing its weekly scientific report Thursday after an unprecedented pause, but information about the bird flu virus that was supposed to ...