Subclade K, a variant of flu type A H3N2, has caught medical professionals off-guard. It already has spread rapidly in ...

A new strain of the flu called subclade K could make for a particularly nasty flu season across the country, according to ...

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Influenza activity across the United States remains low as winter approaches, but health experts say early data is raising ...

A new and potentially more severe variant of the flu, known as H3N2 subclade K, has reached the United States, prompting ...

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

Connecticut confirmed the state’s first flu death of the season on Thursday. It was a person in their 80s from Hartford ...

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