When is the best time of year to receive the flu shot?

The best time to receive the flu shot is often recommended to be before Halloween. This timing is optimal because the flu season typically peaks between December and February, and receiving the vaccine about two weeks before the flu season starts provides your body adequate time to build up immunity. By getting vaccinated in late October, you are more likely to be protected during the initial weeks of the flu season when the virus is circulating widely.

Receiving the flu shot too early in the fall might result in waning immunity as the peak season approaches. Conversely, getting vaccinated after the flu season has started or after major holidays like Thanksgiving or New Year's may leave individuals vulnerable to catching the virus until their immunity builds up. Overall, timing the vaccination just before Halloween ensures that individuals are adequately prepared for the flu season ahead.