April 10, 2021 15:44 Updated Follow The Johnson & Johnson (Janssen) vaccine is a single dose shot and does not require a second dose appointment. Related articles Who should get the Johnson & Johnson (Janssen) COVID-19 vaccine once they become eligible? How do I sign up for an appointment? How is the Johnson & Johnson (Janssen) vaccine different from the Pfizer and Moderna ones? Information about novel coronavirus (COVID-19) Can I get the Johnson & Johnson (Janssen) vaccine with the Moderna or Pfizer vaccines?