What to Know About the New H3N2 Flu Strain - JAMA Network
6 days ago · This Medical News article discusses a new H3N2 influenza strain, called subclade K, that may lead to a more severe flu season.
What Is H3N2 Flu? Symptoms, Risks, and Treatment Guide
Dec 17, 2025 · The H3N2 flu is a subtype of influenza A known for causing more severe illness, especially in older adults and young children. It spreads fast, changes often, and can overwhelm …
Why H3N2 flu feels so intense - Women's Health
1 day ago · H3N2 flu is causing severe fatigue and prolonged symptoms this winter. A GP explains the stages of illness, recovery timeline and warning signs.
What you need to know about the H3N2 flu variant
6 days ago · A new flu variant called H3N2 subclade K is spreading this season in the U.S. and worldwide.
H3N2 Flu: Symptoms, Diagnosis, Treatment - Verywell Health
Nov 7, 2025 · This article discusses what H3N2 flu is, as well as its symptoms and how it's diagnosed and treated.
Influenza A H3N2 mutation causes aggressive flu spread in these US ...
6 hours ago · A highly contagious flu mutation called subclade K is sweeping the nation, raising health concerns about vaccine effectiveness this season. Here are the states at most risk.
Flu season is ramping up, and some experts are "pretty worried"
2 days ago · 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.
What is A/H3N2 K? The flu variant behind 90 per cent of cases
2 days ago · What we know about flu variant A/H3N2 K: The strain behind 90 per cent of cases Subclade K of A/H3N2 (formerly known as J.2.4.1) has been detected on all continents
New Flu Variant May Be Triggering Spike in Severe Disease
Dec 16, 2025 · There’s a new flu variant in town, and it ain’t pretty. A mutated form of the influenza A strain H3N2 known as subclade K is causing a severe flu season in multiple countries across the …
The New Flu Variant Could Spread Widely This Year ... - The New York …
Dec 17, 2025 · The main version of flu spreading in the United States right now is H3N2 subclade K. H3N2 is a common strain, but the specific type of it circulating now — subclade K — is what’s new.