Initial booster shots are recommended for those who are:
- 12 and older and completed their primary vaccination series of Pfizer at least 5 months ago
- 18 and older and completed their primary vaccination series of Moderna at least 5 months ago or completed their primary vaccination of Johnson & Johnson at least 2 months ago
Clinical trials and observational studies show that all COVID-19 vaccines authorized in the United States are effective at preventing COVID-19, especially severe disease, hospitalization, and death For primary and booster vaccination, people should receive an age-appropriate mRNA vaccine (Pfizer or Moderna). The Johnson & Johnson vaccine is authorized for anyone age 18 and older if no other approved vaccine is available.