Leviticus 13:24 talks about how the priest needs to examine the skin for leprosy after it has been burned by fire on the condition that the burn turns into a bright, reddish-white, or white spot. Verse 25 states that if the hair of the bright spot has turned white and appears deeper than the skin, then it's a leprous sore and the person is pronounced to be unclean.
Well, that's pretty crazy. I guess leprosy will cause the hair of the skin to sink in. Verse 26 states that if the priest cannot find white hairs on the bright spot and isn't deeper than the skin while having faded then the person needs to be isolated for seven days. In a way, it seems like the person is being quarantined temporarily. Verse 27 says that if the spot has spread all over the skin then it is a leprous sore and the person is made to be unclean. Verse 28 states that if the bright spot stays in only one place then it's just going to be a scar.