Flu cases are spiking earlier than usual. What you need to know.

Known as subclade K, a new, mutated flu strain that has dominated in Europe and Asia is now rapidly spreading across the US.

Flu sublcade K drives up cases in 52 Florida counties

Following a national trend, 52 counties in Florida saw increasing cases of influenza A driven by a new mutation called ...

Doctors warn of ‘super flu’ variant circulating in hot spots across the country

Ahead of the holiday tourist rush, city health officials in New York City reported nearly 14,000 flu cases in the first week ...

Flu season is hitting kids hard. As the holidays near, older adults are likely next.

A new strain called H3N2 subclade K has emerged, raising concerns that the body may not be able to fight it off as well.
Scientific American

New Flu Variant May Be Triggering Spike in Severe Disease

A novel influenza variant called subclade K appears to be driving an uptick in cases and hospitalizations throughout the U.S.
Medscape

New H3N2 Variants May Challenge Flu Vaccines in 2025-2026

Changes in the key antigenic regions of H3N2 viruses suggest that the upcoming flu season may require closer attention to ...

Doctors warn of ‘super flu’ variant in hot spots like New York

Ahead of the holiday tourist rush, city health officials in New York City reported nearly 14,000 flu cases in the first week ...

Nearly 5 million flu illnesses reported so far nationally, latest CDC data shows

The CDC estimates that there have been at least 4.6 million illnesses, 49,000 hospitalizations, and 1,900 deaths from flu ...
Medscape

New ‘Subclade K’ Flu Strain Surges Across Europe

More than 90% of confirmed influenza cases in the World Health Organization (WHO) European Region have tested positive for a new mutated strain of influenza known as AH3N2 J.2.4.1 or “subclade K,” the ...