On the seventh day the priest shall examine him again: if the affection has faded and has not spread on the skin, the priest shall pronounce him clean. It is a rash; he shall wash his clothes, and he shall be clean. But if the rash should spread on the skin after he has presented himself to the priest and been pronounced clean, he shall present himself again to the priest. And if the priest sees that the rash has spread on the skin, the priest shall pronounce him unclean; it is leprosy.
When a person has a scaly affection, it shall be reported to the priest. If the priest finds on the skin a white swelling which has turned some hair white, with a patch of undiscolored flesh in the swelling, it is chronic leprosy on the skin of his body, and the priest shall pronounce him unclean; he need not isolate him, for he is unclean. If the eruption spreads out over the skin so that it covers all the skin of the affected person from head to foot, wherever the priest can see--if the priest sees that the eruption has covered the whole body--he shall pronounce the affected person clean; he is clean, for he has turned all white. But as soon as undiscolored flesh appears in it, he shall be unclean; when the priest sees the undiscolored flesh, he shall pronounce him unclean. The undiscolored flesh is unclean; it is leprosy. But if the undiscolored flesh again turns white, he shall come to the priest, and the priest shall examine him: if the affection has turned white, the priest shall pronounce the affected person clean; he is clean.