A highly contagious flu mutation called subclade K is sweeping the nation, raising health concerns about vaccine effectiveness this season. Here are the states at most risk.

The new Covid variant is continuing to proliferate around the U.S. — although you might not know it by just checking federal variant-tracking dashboards. Known as NB.1.8.1, the omicron variant has ...

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 ...

This year’s flu season is shaping up to be a nasty one—driven by a new variant of the influenza virus that may be able to slip past our vaccine defenses. A mutated form of the influenza A strain H3N2 ...

Get inspired by a weekly roundup on living well, made simple. Sign up for CNN’s Life, But Better newsletter for information and tools designed to improve your well-being. A new coronavirus variant is ...

The COVID-19 variant that may be driving a recent rise in cases in some parts of the world has earned a new nickname: "razor blade throat" COVID. That's because the variant — NB.1.8.1. or "Nimbus" — ...

This is an update of an article originally published on September 23, 2024. As the United State gears up for a potential surge of COVID-19 cases during the colder months ahead, health authorities are ...

A new variant has entered the COVID-19 picture, and scientists have warned that it might soon surge to dominance. XEC, which was first identified in Germany in June, has now been spotted in Denmark, ...

As COVID-19 activity remains high across the United States, a new hybrid variant called XEC is spreading rapidly in Europe and other parts of the world. The XEC variant has been detected in at least ...

A new COVID-19 variant, unheard of just months ago, is projected to be the second-most common strain in the U.S. just in time for summer. Variant NB.1.8.1, first detected in January in China, ...