A new version of the common flu is spreading globally, and health officials are monitoring this evolving strain of influenza A(H3N3) Subclade K, which has been increasingly detected worldwide.

The “super flu” behind outbreaks in the US and UK is a new variant of influenza A H3N2, subclade K. Existing vaccines appear to be insufficiently effective against the virus.

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

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 ...

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 ...

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.

WASHINGTON (AP) — Flu is rising rapidly across the U.S., driven by a new variant of the virus — and cases are expected to ...

A new COVID-19 variant that was unheard of just months ago is now projected to be the second-most common strain in the United States. Variant NB.1.8.1 was first detected in China in January but ...

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

A new COVID-19 strain, referred to as NB.1.8.1 or "Nimbus," first appeared in the U.S. sometime near the end of April and is currently the dominant variant in the U.S. The new variant is said to be ...

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.