Children 6 months through 4 years of age should receive:

• An initial 3-dose series and dose 4 should be from the same manufacturer
  

May receive additional doses of COVID-19 vaccine from the same manufacturer under shared clinical-decision making at least 8 weeks after the last dose

*Minimum interval 8 weeks

Reference: Interim Clinical Considerations for Use of COVID-19 Vaccines | CDC and 2024-2025 COVID-19 Vaccine Immunization Schedule for People 6 Months of Age and Older (cdc.gov)