Influenza is on the rise. Flu activity was "high" or "very high" in 32 states and jurisdictions, as of Dec. 30, according to the CDC.

Flu cases and hospitalizations are surging, already breaking last season's records. Here's where activity is highest, what ...

Subclade K (previously known as J.2.4.1) is gaining attention because it appears to be spreading much earlier in the flu ...

Respiratory virus season is in full swing across California, with several illnesses spreading across the state. Cases of ...

This year's flu season is shaping up to be particularly brutal. Here's what to know this week, including cases taking a ...

It is definitely still worth getting a vaccine. If H1N1 comes around, you can get infected with that one or even a second ...

Flu is rising rapidly across the U.S., driven by a new variant of the virus. The Centers for Disease Control and Prevention ...

The CDC estimates there have been at least 19 million cases so far this season.

Is it flu A or flu B, and how long is it contagious? Here's what to know about the flu virus running rampant in New Jersey, symptoms, more.

A new flu strain has been detected, with the variant dubbed influenza A subclade K. How severe is the strain and does the ...

Winter and flu have become almost synonymous with each other. Now, a new flu strain is spreading across the US, leading to a ...

A new flu strain is surging nationwide. Georgia reports double the hospitalizations from last year. Learn the symptoms and ...