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

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. is currently grappling with an intense flu season, with the CDC reporting over 24 million cases, 310,000 hospitalizations, and 13,000 deaths. According to infectious disease epidemiologist Dr ...

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

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.

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