In
health care facilities,
isolation represents one of several measures that can be taken to implement
infection control: the prevention of
contagious diseases from being spread from a
patient to other patients, health care workers, and visitors, or from outsiders to a particular patient (reverse isolation). Various forms of isolation exist, in some of which contact procedures are modified, and others in which the patient is kept away from all others. In a system devised, and periodically revised, by the U.S.
Centers for Disease Control and Prevention (CDC), various levels of patient isolation comprise application of one or more formally described "precaution".