In some universities in Spain, they have mandatory antibody tests, and they divide students in 3 groups: the ones with antibodies, the ones without and sick people that can follow the classes online.

To enter the buildings in the campus, you need to get a "passport", after completing antibody test and lots of questions... Some preconditions, like being asthmatic disqualifies you (so you need to follow classes online). Also, they have several new rules, like using only stairs to move across floors, minimum distance, thermal cameras, etc.

It's a new world in many aspects.