1. Room two and three are isolation rooms and single bed rooms, all of the other rooms are double-bed rooms; the following abbreviations are used: C = cabinet of the clinicians, IR = intervention room, N = nursing station, RR = restrooms (for staff), PS = cabinet of the psychologist, P = playroom, K = kitchen for the patients, their families and relatives; The nursing station and the intervention room are equipped with a washing basin The infected patients stayed within the following rooms prior to the infection: patient A within room 3, patient B within room 5 and patient C within room 8.