3 days ago · There is data from U.K. health officials suggesting there is some vaccine effectiveness against the H3N2 strain. What to know about the "super flu" Reality check: There …

Dec 17, 2025 · A new strain of H3N2 influenza is landing a growing number of Canadians in hospital with cases “increasing rapidly” around the country.

4 days ago · The “super flu” is a variant of influenza A H3N2 called subclade K. Historically, similar variants have caused more severe disease and taken longer to recover from.

Nov 9, 2025 · With flu cases now rising in Canada, medical experts are bracing for a difficult influenza season linked to the global spread of an evolving H3N2 strain that could be a …

Dec 19, 2025 · A fast-spreading strain of influenza A (H3N2), known as subclade K, has fuelled headlines warning of a possible “superflu”. The reality is more nuanced, scientists say.

Dec 22, 2025 · Doctors and scientists say this year's influenza season could be tougher than usual, with a new version of the flu virus, called H3N2, spreading quickly.

Nov 25, 2025 · H3N2 is the dominant virus so far this flu season, and when that's the case, public health experts are already on guard. Though it hasn't been a novel strain in nearly 60 years, …

The report warned “indicators of influenza activity are increasing rapidly,” noting most tests were positive for influenza A and specifically H3N2.

Dec 24, 2025 · Flu has come early this winter with a new mutated version of the virus circulating. The NHS has already sent out a "flu jab SOS" encouraging vulnerable people to get their free …

As influenza activity increases this winter, many people are hearing unfamiliar labels like influenza A(H3N2) “subclade K” (J.2.4.1) and wondering whether they signal a more dangerous wave. …