The CDC recommends eligible people 6 months and older receive an updated, bivalent Pfizer or Moderna vaccine that offers better protection against variants. The Novavax vaccine is available as a two-dose primary series for people 12 and older. 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.
The monovalent Novavax booster and the Johnson & Johnson primary and booster vaccinations are authorized for people 18 and older in limited situations.
The CDC has guidance for everyone 6 months and older based on age and medical condition.