Update: COVID boosters now available for Johnson & Johnson, Moderna vaccines

On October 20, the U.S. Food and Drug Administration (FDA) made amendments to the Emergency Use Authorizations (EUA) for the Moderna and Johnson & Johnson/Janssen COVID-19 vaccines, expanding the use of a booster dose in eligible populations. On October 21, the Centers for Disease Control and Prevention issued booster recommendations for all three COVID-19 vaccines that are available in the United States. 

The CDC has granted approval for the administration of "mix and match" vaccines—a booster different from the vaccine that was originally administered. Only one booster dose is needed regardless of which vaccine product was used for the initial/primary series.

For individuals who received a Pfizer-BioNTech or Moderna COVID-19 vaccine, the following groups are eligible for a booster shot 6 months or longer after their primary series:

Note: The Moderna COVID-19 booster dose is half of the dose administered for the primary series.

For individuals who received the Johnson & Johnson/Janssen vaccine, a second dose is recommended for everyone who was vaccinated at least two months ago, regardless of risk factors. This vaccine is only approved for those 18 years and older. If you have questions, please email c19vacsch@utmb.edu.

APPOINTMENTS ARE REQUIRED for all booster doses and can be made online at https://www.utmb.edu/covid-19/patients#vaccine. If you are interested in pursuing a “mix and match” option, please call (832) 632-6731 or email C19Vacsch@utmb.edu for assistance. Online scheduling for "mix and match" boosters will be available soon.

Information on the CDC Emergency Use Authorizations for each vaccine is available online: 


Thank you, 

Janak Patel, MD
Director, Infection Control and Healthcare Epidemiology
Professor, Pediatrics/Infectious Disease

Philip Keiser, MD
Professor, Internal Medicine/Infectious Diseases
Galveston County Health Authority
UTMB COVID-19 Vaccination Preparedness Task Force Chair