And the Lord spake unto Moses, saying, 2. This shall be the law of the leper in the day of his cleansing: He shall be brought unto the priest: 3. And the priest shall go forth out of the camp: and the priest shall look, and, behold, if the plague of leprosy be healed in the leper; 4. Then shall the priest command to take for him that is to be cleansed two birds alive and clean, and cedar-wood, and scarlet, and hyssop: 5. And the priest shall command that one of the birds be killed in an earthen vessel over running water: 6. As for the living bird, he shall take it, and the cedar-wood, and the scarlet, and the hyssop, and shall dip them and the living bird in the blood of the bird that was killed over the running water: 7. And he shall sprinkle upon him that is to be cleansed from the leprosy seven times, and shall pronounce him clean, and shall let the living bird loose into the open field.'--Lev. 14:1-7.
The whole treatment of leprosy is parabolic. Leprosy itself is a parable of death.' The horrible loathsomeness, the contiguousness, the non-curableness, etc. So the man was shut out from camp and from sanctuary. There was a double process in the cleansing rite, restoring to each.