COVID-19 Vaccines for People who are Moderately or Severely Immunocompromised | CDC – Centers for Disease Control and Prevention (.gov)

PRIMARY SERIES COVID-19 VACCINE
Moderna


Age Group:
12–17 years

Number of Doses to Complete Primary Series and Timing:
3 doses

  • 2nd dose given 4 weeks after 1st dose
  • 3rd dose given at least 4 weeks after 2nd dose

Boosters and Timing:

  • Boosters are not recommended at this time for any children or teens who have completed the Moderna COVID-19 primary series.

Age Group:
18+ years

Number of Doses to Complete Primary Series and Timing:
3 doses

  • 2nd dose given 4 weeks (28 days)  after 1st dose
  • 3rd dose given at least 4 weeks (28 days)  after 2nd dose

Boosters and Timing:
1st booster

  • Given at least 3 months after 3rd dose*

2nd booster

  • Given at least 4 months after 4th dose*

* For the 1st booster, an mRNA vaccine booster is preferred for people ages 18 years and older, but you may consider J&J/Janssen COVID-19 vaccine in some situations. However, J&J/Janssen COVID-19 vaccine cannot be used as a 2nd booster dose.

Source