Leviticus 13:43-45

Quarantine periods were usually temporary. A priest would inspect the illness and impose the quarantine. Then he would re-inspect the sick at regular seven-day intervals to look for any improvement. The priest’s responsibility and power was not only as a worship leader, he was also a civil leader, judge, and medical practitioner. This all-encompassing role gave the Levitical priesthood extraordinary authority.

Notice here that the infected person was to take on mannerisms that warned others of the disease. Torn clothing, covering over his mouth, and the call “Unclean! Unclean!” Now, we don't have to walk around saying, "I have a cold! I have a cold!" but we should treat colds in a similar way. The “Unclean! Unclean!” warning was meant to separate the community from those in quarantine. The infected were expected to live outside the community until they were completely over any contagious symptom.

Leviticus 13:43-46

So we see there the extent of the quarantine, removing a person from society.

Now notice here that the infected person was to take on mannerisms that warned others of the disease, for example, torn clothing, covering over his mouth, and the call, ‘Unclean, Unclean!’, which was meant to separate the community from those in quarantine.