The CDC regularly updates its recommendation as new information comes to light.
Isolation and quarantine help protect the public by preventing exposure to people who have or may have a contagious disease.
- Isolation separates sick people with a contagious disease from people who are not sick.
- Quarantine separates and restricts the movement of people who were exposed to a contagious disease to see if they become sick.
For more information, see this comparison from CDC.