Based on your comments, we should immediately quarantine every HIV or AIDS infected individual. It is not safe for them to be walking around among healthy people. They can be released from quarantine when they are cured.
They can be released from quarantine when they are cured. The problem is, there is no cure. However, with medical care (HAART), HIV+ people can walk around and live a reasonably fulfilling life - while infecting other people. So, do we quarantine them for life?
The parallels between HIV and leprosy seem significant.