1 day ago · A mutated strain of influenza A, H3N2 subclade K, is surging worldwide, sparking concern about a severe flu season in the U.S. Here's what to symptoms to look out for.

8 hours ago · Early signs of a rough flu season There are signs that this season could be a bad one.

1 day ago · A newly mutated H3N2 subclade K flu strain with seven mutations is spreading fast worldwide, causing rising cases and concerns over vaccine mismatch.

Nov 24, 2025 · There's a new flu strain that is spreading rapidly across the Northern Hemisphere at the moment. The surge in cases of the new strain has prompted health officials to warn of a potentially …

Nov 21, 2025 · With a new strain spreading and less Americans getting vaccinated, the sick season might be brutal. Here's what to know.

11 hours ago · What are the symptoms? Flu signs and symptoms develop very rapidly and extreme tiredness is common, which differs from the symptoms of colds that occur more gradually, according …

Nov 25, 2025 · Worried about the new H3N2 flu strain? Learn how it affects flu vaccine protection, key symptoms to watch for and steps to lower your risk.

Aug 26, 2024 · Symptoms Flu can cause mild to severe illness, and at times can lead to death. Flu symptoms usually come on suddenly. People who have flu often feel some or all of these signs and …

Nov 13, 2025 · Experts are worried that the new version of H3N2 doesn't match the strain used to create this year's flu vaccine, though such mismatches are common with seasonal flu strains. Here's what …

13 hours ago · Flu in the US The new mutated flu strain version of the H3N2 virus has also spread in the US. Last week there was an 8% increase in people testing positive for the flu virus. An estimated 2.9 …