The FDA amended the emergency use authorizations (EUAs) for the Moderna and Pfizer COVID-19 vaccines, allowing for a single booster dose among all individuals 18 years of age or older, after completion of primary vaccination.
Previously, booster doses were only authorized for certain special populations, such as the elderly, those at high-risk of severe COVID-19, and those with high occupational exposure. This new authorization now applies to all adults in the country.
Booster doses may be administered six months after the completion of the primary vaccination series of the Moderna or Pfizer vaccine, or two months after completion of primary vaccination with the Johnson & Johnson (Janssen) vaccine. While the FDA did not make any comment on whether individuals could mix-and-match their booster dose – getting a different vaccine than their original dose(s) – the CDC recognizes no issue with receiving a booster dose from a different vaccine than the one originally received.