If you are age 6 months to 4 years, you need 2 doses of COVID-19 vaccine, 8 weeks apart. The Moderna XFG vaccine can start or complete your 2-dose series.
If you have already had 2 or more doses of a non-XFG COVID-19 vaccine, you can get 1 dose of the Moderna XFG vaccine at least 3 months after your last dose of COVID-19 vaccine.