משנה על ויקרא 13:45

If it broke out covering all of his skin all at once: If this originated in a condition of cleanness, he is unclean; But if it originated in a condition of uncleanness, he is clean. One who becomes clean after having been isolated is exempt from the uncovering his head and rending his clothes, from shaving his hair and from bringing the birds. If he becomes clean after he had been certified unclean, he is liable to all these. Both convey uncleanness by entering.