Flu vaccines are available throughout the fall and winter each flu season. You should get a flu vaccine as soon as possible if you’re not yet vaccinated.
Flu season starts in the fall, and most of the time, flu activity peaks between December and February. The CDC recommends that people get vaccinated early in the season, ideally by October 31, but it’s never too late to get critical protection from the flu if you’re not yet vaccinated.
Added December 14, 2023