If you received a Pfizer-BioNTech, Comirnaty or Moderna primary series, you should get a booster at least 6 months after last dose in the primary series if you are:
If you received a Pfizer-BioNTech, Comirnaty or Moderna primary series, you may get a booster at least 6 months after last dose in the primary series if you are:
When to get a booster if you received a Pfizer-BioNTech, Comirnaty or Moderna vaccine: At least 6 months after your second shot
Which booster should you get? Any of the COVID-19 vaccines authorized in the United States
If you received the J&J/Janssen COVID-19 vaccine, you are eligible for a booster if you are 18 years or older
When to get a booster if you received the J&J/Janssen COVID-19 vaccine: At least 2 months after your primary series
Which booster should I get? Any of the COVID-19 vaccines authorized in the United States.
CDC advises people ages 18 years and older who received a J&J/Janssen COVID-19 vaccine at least 2 months ago should get a booster shot. The J&J/Janssen COVID-19 vaccine has lower vaccine effectiveness over time compared to mRNA COVID-19 vaccines (Pfizer-BioNTech and Moderna).
Eligible individuals may choose which vaccine they receive as a booster dose. Some people may have a preference for the vaccine type that they originally received, and others may prefer to get a different booster. CDC’s recommendations now allow for this type of mix and match dosing for booster shots.
What is the difference between an additional primary dose and a booster shot?
An additional primary dose is administered to people with moderately to severely compromised immune systems. The additional primary dose of an mRNA COVID-19 vaccine is intended to improve immunocompromised people’s response to their vaccine primary series. A booster shot is administered when a person has completed their vaccine primary series to enhance or restore protection against COVID-19 which may have decreased over time.