The Pulpit Commentary - Leviticus 13:3
It is a plague of leprosy. The chosen type of sin—its individual aspect. The conjecture that leprosy was contracted by the children of Israel in the hot and dusty brick-fields of Egypt is probable enough. The definition that it was "any severe disease spreading on the surface of the body in the way described in the chapter, and so shocking of aspect … that public feeling called for separation," is near enough for our purpose, There can be no question that it was the divinely chosen type... read more
The Pulpit Commentary - Leviticus 13:3
When the hair in the plague is turned white. This is the first symptom, and the most noticeable as the commencement of the disease. The hair around the spot loses its colour and becomes thin and weak, the separate hairs being hardly stronger or individually thicker than down. The second symptom is when the plague in sight be deeper than the skin of his flesh ; that is, below the upper skin, or cuticle, and in the real cutis. These two symptoms distinguish real leprosy from other affections... read more