To be considered fully vaccinated, the Comirnaty (Pfizer-BioNTech), Spikevax (Moderna) and Novavax vaccine require two doses. The Johnson & Johnson (Janssen) vaccine requires one dose. The Pfizer-BioNTech vaccine for children 6 months to 4 years old requires three doses.
The CDC recommends that people stay up to date with their vaccinations and get boosted when eligible.Use CDC’s COVID-19 vaccination schedule, or answer a few questions on the CDC website to make sure you are up to date.