If you receive the Comirnaty (Pfizer) or Moderna vaccines, you must get your first vaccination before you can sign up for your second one. You will be asked to make an appointment for your second vaccination when you get your first one. If you do not sign up then, you will get reminders by text or email. Please remember if you received the Johnson & Johnson (Janssen) vaccine, it is only one dose and does not require a second appointment.