Those who have leprosy might as well be dead. Never mind that the disease we call leprosy today may or may not be one of the skin diseases meant by the Hebrew word tzara’at (צָרַעַת). The fact is, whoever had it was cut off from the community:
Now the leper on whom the sore is, his clothes shall be torn and his head bare; and he shall cover his mustache, and cry, “Unclean! Unclean!” He shall be unclean. All the days he has the sore he shall be unclean. He is unclean, and he shall dwell alone; his dwelling shall be outside the camp. (Leviticus 13:45-46 NKJV)
Think about that for a moment. Lepers could not go home. They could not have any kind of normal relationship with their family members, friends, business associates, or anyone else with whom they interacted before the cursed condition fell upon them. It did not matter what station of life the leper occupied; whether peasant or king, the disease cut them off from the life of the nation. Even mighty King Uzziah of Judah learned that. Although he reigned for 52 years in Jerusalem, the leprosy he contracted in the midst of his reign meant that he was king in name only:
King Uzziah was a leper until the day of his death. He dwelt in an isolated house, because he was a leper; for he was cut off from the house of the Lord. Then Jotham his son was over the king’s house, judging the people of the land. (II Chronicles 26:21 NKJV)
How can a person shepherd the people of God when he is cut off from the House of God? Is there any hope for him, or for the people he is anointed to lead?
Yes, there is hope. That is why the Torah portion Metzora (The Leper; Leviticus 14:1-15:33) provides elaborate detail on the procedures for cleansing lepers. Once healed, the priests help them through this process to restore them to their place in society. In a certain sense, this is a resurrection from a type of death, and thus it is a symbol of what Messiah will do.