After a sharp uptick in flu cases in mid-December 2025, flu activity across the U.S. and Canada remains high.

A new flu variant, subclade K, is driving an uptick in cases across the U.S. and prolonging influenza seasons in other parts of the world.

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

Flu cases are rising rapidly across the US due to a new strain called subclade K, a mutated form of the H3N2 influenza A virus. The variant spreads quickly and may increase the risk of complications ...

A ferocious surge of flu cases is linked in part to a variant that has not been dominant in the past few years — resulting in ...

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

Much of the country is facing record flu cases thanks to a new strain of the virus. And the "subclade K" variant is likely already here in Spokane. The new strain formed last year as influenza A's ...

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

The Centers for Disease Control and Prevention listed the COVID-19 delta variant as one of its "variants of concern" (VOCs) on June 15. According to the CDC, VOCs can be more contagious, more ...

The fast-spreading delta variant of the coronavirus has been gaining traction worldwide since it was first detected in India. It’s a version of the coronavirus that has been found in more than 80 ...

It's been less than a month since health officials reported the first known case of a new and more contagious coronavirus variant in Texas. The man, a Harris County resident, had no travel history.