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

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

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.

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

Despite days in close quarters with flu patients, healthy volunteers didn’t get sick – revealing insights into transmission.

A particularly infectious subvariant of influenza is keeping emergency room numbers high and causing especially severe ...

The HSE says the flu is still spreading widely across Ireland and is urging anyone with symptoms to stay at home.

Researchers report that shared indoor space alone is insufficient for influenza spread, highlighting the importance of ...

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

Nearly 1.5 million birds have been infected in 67 commercial and backyard flocks in 10 states so far this year, according to ...

The spike in flu cases widely referred to in media reports as a "superflu" is largely driven by a newly identified subtype of ...