International Standard Version When the priest examines it on the seventh day and finds that it has indeed spread on the skin, then the priest is to declare him unclean. It's an infectious skin disease.
American Standard Version and the priest shall look upon him the seventh day: if it spread abroad in the skin, then the priest shall pronounce him unclean: it is the plague of leprosy.
Young's Literal Translation and the priest hath seen him on the seventh day, if it spread greatly in the skin, then the priest hath pronounced him unclean; a plague of leprosy it is.