This story was updated to add new information. A new flu variant is sweeping across the United States, causing millions of reported cases and doubling the number of hospitalizations in a surge doctors ...

A new mutated strain of the common flu, influenza H3N2, subclade K, is spreading across the Northern Hemisphere, including the United States. This particular strain has gained dominance in many ...

A new flu strain that has been dominating cold and flu season overseas is on the rise in the United States. The mutated strain, known as subclade K, originates from the most common flu-causing virus, ...

Add Yahoo as a preferred source to see more of our stories on Google. Boy get cold and blow her nose at home. Vera Livchak / Getty Images It started after a Christmas party. Natalie Rowe, a ...

Doctors and scientists say this year's influenza season could be tougher than usual. A new version of the flu virus, called H3N2, is spreading quickly. At the same time, fewer people are getting flu ...

Activity during the current flu season is growing to severe levels, with the percentage of doctors’ visits for flu-like illnesses reaching the highest level on record, according to the most recent ...

The flu epidemic is stabilizing. The positivity rate and other benchmarks for the week ending on Jan. 10 have decreased compared with the previous week, according to the latest data from the Centers ...

It started after a Christmas party. Natalie Rowe, a 42-year-old web designer living in the United Kingdom, noticed she felt a little bit like she was losing her voice. She assumed it was because she ...