
The autumnal equinox may be three weeks away, but fall’s unofficial arrival has already ushered in the updated, 2024–25 flu vaccines.
An influenza virus can make you ill any time of year. What we think of as the seasonal flu in the U.S., however, usually spreads throughout the fall and winter, peaking between December and February, according to the Centers for Disease Control and Prevention (CDC). Even though vaccines can stave off severe infection, hospitalization, and death, their protection declines over time. That said, you may be wondering, When is the best time to get my annual flu shot?