If I was vaccinated for COVID-19 outside of the United States, do I need to get or can I get a U.S.-based vaccine?

What you need to do depends on the type of vaccination you received and whether you completed the series. If you received:

A Food and Drug Administration-authorized vaccine (Modern, Pfizer, or Johnson and Johnson):

  • If you had two doses of Moderna or Pfizer or a single dose of Johnson and Johnson, you have completed the series.
  • If you are immunocompromised, you might qualify for an additional dose if you received Modern and Pfizer. There is not yet a recommendation for additional doses if you received Johnson and Johnson, but more information should be available soon.
  • If you received just one dose of Moderna or Pfizer, you should seek a second dose as close to the recommended timeframe as possible (28 days for Moderna, 21 days for Pfizer)

A vaccine listed for emergency use by the World Health Organization:

  • If you completed a vaccine series, you should not seek additional doses. There is currently no authorization to provide you with additional FDA-authorized vaccines, though we will continue to monitor guidance.
  • If you completed just part of a series, you should seek a complete, FDA-authorized COVID-19 vaccine series. You should wait until it’s been at least 28 days since your last dose to begin an FDA-authorized vaccine series.

A non-WHO-listed or FDA-authorized vaccine:

  • If you received all or part of a vaccine that is not currently authorized by the FDA or granted emergency use listing by the WHO, you should seek a complete, FDA-authorized COVID-19 vaccine series. You should wait until it’s been at least 28 days since your last dose to begin an FDA-authorized vaccine series.

You must receive all recommended doses of an FDA-authorized or WHO-listed COVID-19 vaccine to be considered fully vaccinated.