The Corona rules have been relaxed considerably. Those who have not been vaccinated in particular benefit from the relief. You can find out what now applies to buses and trains in NRW here:
Hamm – Access restrictions in means of transport applied for four months. Anyone who wanted to travel by bus or train had to be able to show their vaccination or recovery certificate or a negative Corona* test at the check. Now the Infection Protection Act has been changed – and many measures are no longer applicable.
The rules were also relaxed in North Rhine-Westphalia*. wa.de * knows which corona rules now apply to buses and trains in NRW. *wa.de is an offer from IPPEN.MEDIA.