A new flu variant, subclade K, is driving an uptick in cases across the U.S. and prolonging influenza seasons in other parts of the world.

Potentially more than 90% of Alzheimer's disease cases would not occur without the contribution of a single gene (APOE), ...

A new flu variant is spreading across the country, prompting levels of respiratory illness not seen in nearly 25 years.

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 flu variant is causing numbers to soar this season. The latest available weekly numbers show flu cases in Connecticut ...

The XFG variant of the severe acute respiratory syndrome coronavirus 2 as continued to spread as the U.S. heads into peak Summer travel season. (Photo by I RYU/VCG via Getty Images) There’s another ...