Use of COVID-19 Vaccines in the United States

Interim Clinical Considerations

FDA has approved and authorized 2024–2025 Moderna and Pfizer-BioNTech COVID-19 vaccines. CDC recommendations for use of these vaccines in people ages 6 months and older can be found below.

The 2023–2024 Novavax COVID-19 Vaccine remains authorized but is no longer available in the United States as all doses have expired. Accordingly, at this time, CDC recommendations for use of Novavax COVID-19 Vaccine have been removed from the Interim Clinical Considerations. This page will be updated if FDA approves or authorizes additional 2024–2025 COVID-19 vaccines.

Summary of recent changes (last updated August 23, 2024):

Recommendations for 2024–2025 Moderna COVID-19 Vaccine and 2024–2025 Pfizer-BioNTech COVID-19 Vaccine


People who are not moderately or severely immunocompromised

Initial vaccination

  • Ages 6 months–4 years
    • 2 doses of 2024–­2025 Moderna or 3 doses of 2024–­2025 Pfizer-BioNTech
  • Ages 5 years and older
    • 1 dose of 2024–2025 Moderna or 1 dose of 2024–2025 Pfizer-BioNTech

Received previous doses of a COVID-19 vaccine

  • Ages 6 months–4 years
    • 1 or 2 doses of 2024–­2025 mRNA vaccine from the same manufacturer as administered for initial vaccination, depending on the vaccine and the number of prior doses
  • Ages 5 years and older
    • 1 dose of 2024–­2025 Moderna or 1 dose of 2024–­2025 Pfizer-BioNTech

Additional dose: An additional dose of 2024–­2025 COVID-19 vaccine for people ages 65 years and older who are not moderately or severely immunocompromised is NOT currently recommended.


People who are moderately or severely immunocompromised

Initial vaccination

  • Ages 6 months and older
    • 3 doses of 2024–­2025 Moderna or 3 doses of 2024–­2025 Pfizer-BioNTech

Received previous doses of a COVID-19 vaccine

  • Recommended mRNA vaccine and number of 2024–­2025 doses are based on age and vaccination history

Additional doses: People who are moderately or severely immunocompromised ages 6 months and older may receive 1 or more age-appropriate doses of a 2024–2025 mRNA COVID-19 vaccine.

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