The following regulations currently exist:
Travellers must present a negative COVID-19 rapid test from an official site, a complete vaccination or proof of recovery on arrival. Tests can be done locally at the Dorum-Neufeld test centre in the children's playhouse of the spa administration.
Opening hours are daily from 10:30 to 17:00. Appointment booking online at: https://corona-testservice.de/terminbuchung-dorum-neufeld/