Health leaders are raising concerns about subclade K, a variant of influenza A that has mutated from the original H3N2 strain ...

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

The mutation, known as subclade K, has already caused a surge in flu cases in Australia, Canada, Japan, and the U.K.

A severe flu season driven by Influenza A is spreading rapidly, with child deaths reported in Canada. The fast-mutating virus ...

It’s actually pretty easy, experts say, because of how abruptly it hits and how bad you feel. One minute you’re fine and the next you’re miserable, with symptoms that can include fever and chills, ...

Of particular concern, scientists say, is the mismatch of the flu virus and available vaccines. Here's what a UVA Health expert says.