Cordon sanitaire (medicine)
A cordon sanitaire (French pronunciation: [kɔʁdɔ̃ sanitɛʁ], French for "sanitary cordon") is the restriction of movement of people into or out of a defined geographic area, such as a community, region, or country. The term originally denoted a barrier used to stop the spread of infectious diseases.
Source: Wikipedia — Cordon sanitaire (medicine) (CC BY-SA 4.0)