Flu is rising rapidly, driven by a new variant. Here’s what to know
December 30, 2025
Flu is rising rapidly across the U.S., driven by a new variant of the virus. The Centers for Disease Control and Prevention reported Tuesday that after a slow start to flu season in early December, much of the country is now seeing a jump in cases. The agency estimates there have been 3,100 deaths already, including at least eight children. A new version of the harsh H3N2 flu strain is causing most of the illnesses. While the flu shot isn’t a perfect match to that variant, health experts urge vaccination as it provides at least partial protection.