Feeling under the weather? You could have Influenza Type A. Here's the difference between Influenza Type A and Type B.

Flu-related pediatric deaths have doubled since last week, according to the CDC. Here's what to know this week, including ...

The Influenza A H3N2 virus subclade K represents a change in the basic structure of the influenza virus.

One type mutates often and causes seasonal pandemics. The other one doesn't. Here's what else is different.

All viral activity benchmarks have gone down, except for a slight increase in the death rate. Here's what to know about the ...

A late-emerging influenza A mutation known as subclade K weakened protection, but doctors say vaccination still reduces ...

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, ...

(NEXSTAR) – As we get deeper into flu season, a new type of the influenza virus has been identified, the Centers for Disease Control and Prevention confirms. The new strain is a variation of influenza ...

Medical experts debunk flu shot myths: vaccines use inactive virus that cannot cause illness. Discover what side effects actually mean for your immunity.

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

Flu-related hospital admissions are up since December and the respiratory illness season typically extends through April.