Define isolation versus quarantine and provide outbreak examples for each.

• A. Isolation separates ill persons with confirmed disease; quarantine restricts movement of exposed persons who are not yet ill. Example: isolation for confirmed measles; quarantine for exposed household contacts.
• B. Isolation is for exposed persons; quarantine is for ill persons.
• C. Both terms mean the same and are interchangeable.
• D. Isolation is only used in hospitals; quarantine is only used in schools.

Answer: (A)

Isolation keeps apart people who are already sick with a contagious disease to prevent spreading it. Quarantine separates and restricts people who were exposed to a contagious disease but are not yet ill, to see if they become sick during the incubation period.

Outbreak example of isolation: someone with confirmed measles is isolated in a hospital or at home until they are no longer contagious, preventing transmission to others.

Outbreak example of quarantine: household contacts or travelers who were exposed to measles are instructed to stay at home and limit contact with others during the incubation period to monitor for symptoms.

The idea that isolation covers exposed individuals or that quarantine covers the ill is not correct, and these terms aren’t limited to hospitals or schools.