Quarantining in general means the separation of a person or group of people reasonably believed to have been exposed to a communicable disease but are not yet symptomatic from others who have not been exposed to prevent the possible spread of the disease. Self-isolation means the separation of a person or group known or reasonably believed to be infected with a communicable disease and potentially infectious from those who are not infected to prevent spread of the disease.
For more information, please visit the Centers for Disease Control.