Subclade K has become the dominant form of flu and is slightly different from the virus targeted by this year’s flu vaccine.

The “super flu” is a variant of influenza A H3N2 called subclade K. Historically, similar variants have caused more severe ...

A variant of influenza A, H3N2, is spreading across the U.S., with low vaccination rates contributing to infection rates.

A new version of the common flu is spreading globally, and health officials are monitoring this evolving strain of influenza ...

Much of the concern this flu season is coming from the spread of subclade K, a subtype of influenza A. Similar subtypes have ...

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Just before the busy summer travel season in the US, a new COVID variant called NB.1.8.1—also known as “Nimbus”—is quickly spreading across the world. This version of the virus, which is part of the ...

Super flu driven by H3N2 variant spreads across the US alongside norovirus as holiday travel peaks, raising outbreak risks ...

A new COVID-19 variant, NB.1.8.1, is being monitored by the World Health Organization. A key symptom associated with this variant is an extremely painful "razor blade throat." Current COVID-19 ...

If you're feeling sick and your throat pain is quite severe, you may have caught the latest COVID-19 variant, known for its "razor blade" sore throat. The new COVID variant, NB.1.8.1, was first ...

A mutated H3N2 influenza strain known as Subclade K is rapidly spreading across the US, driving an early and intense flu season. Experts say the variant’s mutations may reduce vaccine protection, ...

A painful sore throat, often referred to as "razor blade throat", is just one of the symptoms of a new COVID-19 variant. This variant is currently being monitored by the World Health Organization.