a place or period of separation in which someone or something that is suspicious of carrying a dangerous disease is kept away so that others can be safe
enforced isolation of patients suffering from a contagious disease in order to prevent the spread of disease
to keep a person or animal into isolation for some time because they are ill, or might be, to prevent the spread of the disease
to go into isolation for some time because one is ill, or might be, to prevent the spread of the disease