There are three possible types of room in the hospital:
1. ward (3-4 patients)
2. semi-private room (2 patients)
3. private room (1 patient).
Incidence of hospital-acquired infections is growing, so it would be desirable to promote greater safety for patients in order to avoid those nosocomial infections. So, the best way to prevent the spread of infections is to put patients that are contagious into semi-private and private rooms.