10/10/2025
The ideal time for most people to get a flu shot is in September or October.
Here is a breakdown of the recommendations:
* Optimal Timing for Most: The Centers for Disease Control and Prevention (CDC) and other public health experts recommend that most people get their annual flu vaccine by the end of October.
* Why September/October?
* Flu activity often begins to increase in October and November and typically peaks between December and February
* It takes about two weeks for your body to develop a full immune response (protective antibodies) after vaccination. Getting it in September or October ensures you are protected before the flu season usually gets into full swing.
* Getting it too early (like July or August) can lead to your immunity beginning to wane by the time the season is peaking in the late winter.
* Special Considerations:
* Children: Children who need two doses of the vaccine (which applies to some children aged 6 months through 8 years getting vaccinated for the first time) should start the process earlier so they can receive the second dose by the end of October.
* Pregnant People: If you are in your third trimester during July or August, your healthcare provider may recommend earlier vaccination. This helps pass protective antibodies to your baby to shield them during their first few months of life.
* Older Adults (Age 65+): It is especially important for this group not to get vaccinated too early (like in July or August) because immunity can decrease more quickly. September and October are the best months for them.
Is it too late if I miss October?
No. Even if you don't get your shot by the end of October, you should still get vaccinated later in the season (even into January or later), as long as flu viruses are circulating. Protection is still beneficial and better than no protection at all.
