While flu levels are still low, a strain that's wreaked havoc in the U.K. and Canada is behind most cases so far in the U.S., ...

U.S. flu rates remain low, but experts are keeping an eye on a new strain that’s been linked to unexpectedly early and severe ...

Dr. Tara Narula breaks down a new strain of flu, subclade K, which is causing concern as many people get ready to travel ...

The new variant, known as Subclade K, is currently affecting Japan and the United Kingdom. Experts say the new variant could ...

A new type of seasonal flu virus is raising concerns among health officials as winter approaches. Here's what to know about ...

Flu season is here with a mutated H3N2 strain causing concern. Health experts urge vaccination as holiday gatherings approach ...

An early analysis suggests current vaccines may still be somewhat effective against the new version of the flu ...

A new strain of the flu called subclade K could make for a particularly nasty flu season across the country, according to public health experts.  The strain already caused Japan to declare an ...

New federal data released Friday shows the percentage of medical visits for flu symptoms in Louisiana climbed to 3.9% in the ...

This year's dominant strain of influenza in the U.S. is a new H3N2 variant, which recently mutated, officials say.

The mutated strain, known as subclade K, is causing a surge in cases in the United Kingdom, Canada, and Japan. Here's what to know.

Health experts warn this flu season could be unusually severe, with early spread and concerning H3N2 strain activity across ...