The raw flesh is unclean: this is repeated again and again, because raw or living flesh might rather seem a sign of soundness, and the priest might easily be deceived by it, and therefore he was more narrowly to look into it, and to observe the place and manner and other circumstances in which it appeared.
Related Commentaries of Leviticus 13:15
Leviticus 13:15
15 And the priest shall see the raw flesh, and pronounce him to be unclean: for the raw flesh is unclean: it is a leprosy.