Do I need to register for my second vaccine dose through the same portal?

No, not if you received your first dose in Stuttgart. Whether your initial vaccination was made through a clinic/unit-organized cohort or through the online appointment system, you should not book a second dose through the appointment system. This option is only for individuals who have received their first dose somewhere else and must complete the vaccination schedule.

If you received your first dose in the Stuttgart military community, the clinic is tracking the date you will need your second dose and will contact you prior to it.