Parashas Metzora · Passuk 14:46
Chabad.org — English translation + Rashi
Torah Temima points to Toras Kohanim.
English: “All the days of its closure” — the days of its closure, and not the days after he has scraped off its nega; one might think I exclude the muchlat whose nega he scraped, therefore it says “all the days.”
Duration of the restriction
Chazal define the period during which entry conveys tumah as the official quarantine days, with careful inclusion of the muchlat case.