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

Federal health officials say a dairy worker in Nevada has been infected with a new type of bird flu that’s different from the ...

The winter flu season features two types of influenza. Here's what you need to know about them and how they differ.

Data on flu test positivity and Tamiflu prescription fills show that influenza activity has already surpassed the past 7 ...

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

Eleven states are experiencing very high levels of flu and some schools have been closed by the burden on students and staff.

Last year there were 207 pediatric deaths attributed to the flu, NBC News reported. The CDC said the number of cases is ...

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.

Influenza A — a nasty flu strain that fueled the 2009 flu epidemic — has been landing Ohioans in the hospital since the ...

Flu cases are surging across the nation, closing nearly a dozen schools and swamping hospitals in some states. At least 24 ...