A late-emerging influenza A mutation known as subclade K weakened protection, but doctors say vaccination still reduces ...

This year's flu season is shaping up to be particularly brutal. Here's what to know this week, including cases taking a ...

A fast-spreading new flu strain is gaining a reputation as a monstrous “super flu.” The mutation of influenza A(H3N2) called subclade K is driving up infections across the country, including in New ...

Flu cases are "very high" in Tennessee with outbreaks centered in the eastern part of the state, according to federal and ...

After reporting was delayed due to the holidays, new CDC data shows the flu is spreading, with 33,000 people hospitalized ...

The percentage of flu tests that were positive reached a high of 33.3 per cent for the week ending Dec. 27, Canada’s highest ...

Australia’s 2025 flu season lasted weeks longer than it normally does. Hong Kong’s hit so early that the rollout of seasonal ...

But the most important difference between the two is that type A viruses can cause pandemics because of how often and quickly ...

Even without a perfect match, public health experts say the flu vaccine offers important protection against serious ...

Is it flu A or flu B, and how long is it contagious? Here's what to know about the flu virus running rampant in New Jersey, ...

Approximately 80% of active flu cases are an unexpected strain of Influenza A virus that health officials are calling a super ...

Groundbreaking flu transmission study reveals zero infections despite close contact between healthy volunteers and ...