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.

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

The U.S. is facing its worst flu season in 25 years, according to the Centers for Disease Control and Prevention, which estimates that as of Jan. 3 there have been at least 15 million illnesses, ...

(NEXSTAR) – The flu virus is already hitting hard this season as a new variant spreads rapidly, but it’s not too late to protect yourself, experts say. Much of the concern this flu season is coming ...

(NEXSTAR) – The flu virus is already hitting hard this season as a new variant spreads rapidly, but it’s not too late to protect yourself, experts say. Much of the concern this flu season is coming ...

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

Nearly 9,000 flu cases reported in New Jersey as of the week ending Jan. 3. Here’s what to know about the H3N2 epidemic.

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

Add Yahoo as a preferred source to see more of our stories on Google. The new flu variant, H3N2 subclade K, is a mutation of the common flu A subtype, which is often the flu "going around" come late ...