Additional dose

CDC has recommended third doses of COVID-19 vaccine for those who are moderately to severely immunocompromised due to certain specific conditions:


The U.S. Food and Drug Administration (FDA) has expanded the emergency use authorization for both mRNA vaccines, Pfizer-BioNTech and Moderna, for immunocompromised individuals. This authorization covers people ages 5 and up receiving treatments associated with moderate to severe immune compromise. This includes individuals who have:

  • Been receiving active cancer treatment for tumors or cancers of the blood
  • Received an organ transplant and are taking medicine to suppress the immune system
  • Received a stem cell transplant within the last 2 years or are taking medicine to suppress the immune system
  • Moderate or severe primary immunodeficiency (such as DiGeorge syndrome, Wiskott-Aldrich syndrome)
  • Advanced or untreated HIV infection
  • Active treatment with high-dose corticosteroids or other drugs that may suppress your immune response

People should talk to their healthcare provider about their medical condition and whether getting an additional dose is appropriate for them.

Please note: third doses are not available as walk-ins or at mobile/pop-up clinics.

You may also contact your local pharmacy or health care provider to learn about their process for providing third doses of vaccine.