Flu season in the US is heating up, driven by new subclade K variant
- Posted on December 13, 2025
- By CNN
- 25 Views
Flu season in the US is heating up, driven by new subclade K variant
The latest data on respiratory illness in the United States shows that shoppers and merry-makers are spreading more than just holiday cheer: They’re also passing around germs. In many cases, it’s a new virus variant that’s been causing early and busy flu seasons in Asia, Australia and Europe.
