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

Outpatient health care visits for flu-like illnesses are at their highest levels in 15 years, according to data updated ...

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

Levels of influenza nationwide are now at the highest they have been since the peak of the 2009 swine flu pandemic, according ...

Flu infections are at or near their highest levels in at least 15 years and are still rising, the Centers for Disease Control and Prevention says.

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 ...

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 ...