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.

Why increased isolation is now the enemy of the state among veterans

Historically this time of the year would be filled systemically with holiday cheer. Giving thanks and breaking bread among family. Many veterans traveling through airports around the globe. Others remain standing the watch, or unable to afford the travel back home altogether.