May 21, 2021 23:36 Updated Follow The registration system will prompt participants to schedule their second dose as soon as they have received the first dose. Related articles Should I sign up for my second vaccination at the first visit? I can’t get the second dose at the same place I received the first dose. What should I do? Who should NOT get the Pfizer COVID-19 vaccine (shot)? What if I need to reschedule my appointment? What do I do if I got my first dose in another state but want to get my second dose in Indiana?