Flu virus tracker: Latest update shows high influenza activity across most states. Watch out for these symptoms
As today is the first Monday of 2026, Americans across the country are settling back into their everyday routines after the busy holiday season.
But many are also recovering from the flu—or still suffering from it.
Flu illnesses are surging across the country. According to the most recent data from the Centers for Disease Control and Prevention (CDC), positive influenza test results reached the highest levels of the season for the week ending December 27, 2025.
The CDC publishes a weekly influenza surveillance report that details positive case counts, illness activity levels by state, and breakdowns of flu types.
Due to the winter holidays, the CDC’s latest weekly report was delayed. But the agency published its findings today, January 5,........
