A highly contagious flu mutation called subclade K is sweeping the nation, raising health concerns about vaccine ...

Flu season in America is underway with a new variant called subclade K, recent Centers for Disease Control and Prevention ...

The variant has mutations that may allow it to evade some vaccine protections, though the current flu vaccine still offers some defense.

Flu season intensifies as the new H3N2 variant causes severe illness worldwide. Experts urge vaccination, hand-washing and ...

A novel influenza variant called subclade K appears to be driving an uptick in cases and hospitalizations throughout the U.S.

Last year’s flu season was the roughest in nearly a decade. “We generally don’t have two bad flu seasons back to back,” said ...

Changes in the key antigenic regions of H3N2 viruses suggest that the upcoming flu season may require closer attention to ...

The variant emerged after the 2025-2026 flu vaccine was developed, meaning the current vaccine does not target this specific ...

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 ...

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 ...