What is a booster dose?

The Food and Drug Administration (FDA) and Centers for Disease Control (CDC) have authorized and recommended updated bivalent COVID-19 booster shots to provide continued protection for those who have been fully vaccinated. Boosters strengthen and extend protections against COVID-19.

Eligible individuals may choose which vaccine they receive as a booster dose. See below for a COVID-19 booster eligibility guide.

Eligibility for a Pfizer Booster

  • 5 years or older and it has been at least two months since your last COVID-19 shot, either the last dose in your initial series or an previous booster shot. 

Eligibility for a Moderna Booster

  • 6 years or older and it has been at least two months since your last COVID-19 shot, either the last dose in your initial series or an previous booster shot. 
  • 6 months to 5 years and it has been at least two months since completing the initial Moderna COVID-19 vaccine series.

Eligibility for a Novavax Booster

  • The Food and Drug Administration (FDA) and Centers for Disease Control (CDC) have authorized and recommended a monovalent Novavax COVID-19 booster in certain cases.
  • 18 years or older and it has been at least six months since completion of a primary series COVID-19 vaccine and have not received any previous boosters. 
  • Unable to receive an mRNA bivalent COVID-19 booster due to medical reasons or lack of availability. 

Show All Answers

1. Where can I get a vaccine?
2. Can children receive the vaccine?
3. Where can I get more information about COVID-19 vaccines?
4. Why should I get the vaccine?
5. What are the side effects from the vaccine?
6. How do I know the vaccine is safe?
7. Will the vaccine give me COVID-19? Or make me sick?
8. If I get the vaccine, am I immune to COVID-19?
9. What will the vaccine cost?
10. If I’ve been diagnosed with COVID-19, can I still get the vaccine?
11. Can I get the vaccine if I have COVID or have had another vaccine recently?
12. What is a booster dose?
13. Do I need to have an appointment to get a vaccine?