For some viruses, the protection we receive from a vaccine starts to wane over time. An additional dose of vaccine may be needed to boost your immune response and make sure you are protected from the virus.

Boosters are common for many vaccines including Tdap (tetanus, diphtheria, and pertussis).




Booster Dose

Everyone ages 5+ can get a booster dose

  • Pfizer: At least 5 months after completing their primary COVID-19 vaccination series 

  • Moderna: At least 5 months after completing their primary COVID-19 vaccination series (ages 18+ only) 

  • Johnson & Johnson (J&J): Available; however, Pfizer and Moderna booster doses are recommended over a J&J booster dose at least 2 months after the single J&J dose. 

You may choose any of the currently authorized vaccines for your booster dose. Pfizer and Moderna (mRNA vaccines) are considered the most effective of the 3 authorized COVID-19 vaccines. 

Second Booster Dose

Second booster doses were authorized on March 30, 2022 for the following groups in which it has been at least four months since their initial booster dose:


  • All individuals ages 50+
  • Moderately to severely immunocompromised individuals ages 12+


Additionally, all individuals who received a J&J booster should receive another booster of an mRNA vaccine (Pfizer or Moderna) at least 4 months after their initial booster.


Not sure if it's time for your second booster? Check out this CDC resource.



Additional Dose

The CDC recommends that people ages 5+ whose immune systems are moderately to severely compromised should receive an additional dose of mRNA COVID-19 vaccine 28 days after receiving their second shot.




Additional and booster doses are available at pharmacies and healthcare providersmobile vaccine clinics, and Public Health clinics.  You do not need to return to the same location for your second or booster dose.