Which hygiene measures are valid at the FH Campus Wien? At the locations of the FH Campus Wien, wearing a FFP2 mask remains mandatory in all rooms. However, due to the applicable 2,5-G rule in study and teaching operations, lecturers and students do not have to wear a FFP2 mask in the teaching rooms, laboratories and function rooms, i.e. during face-to-face lectures or examinations. In the generally accessible areas (e.g. foyer, corridor, toilets), a FFP2 mask must be worn.