Flu is rising rapidly across the U.S., driven by a new variant of the virus — and cases are expected to keep growing with holiday travel. That variant, known as “subclade K,” led to early outbreaks in ...

Add Yahoo as a preferred source to see more of our stories on Google. A new flu variant known as subclade K is on the rise across the country. Although a spike in this particular strain of influenza, ...

WASHINGTON (AP) — Flu is rising rapidly across the U.S., driven by a new variant of the virus — and cases are expected to keep growing with holiday travel. That variant, known as “subclade K,” led to ...