August 24, 2021 12:24 Updated Follow The Comirnaty (Pfizer) and Moderna vaccine require two doses. The Johnson & Johnson (Janssen) vaccine requires one. Related articles For how long will vaccination protect me from getting COVID-19? Can an elderly individual use an expired photo ID for proof of age? What questions will I be asked when I sign up for a vaccine (shot) appointment? Does the vaccination site check if a person is eligible to get vaccinated? Do I need to quarantine after I’ve gotten vaccinated?