One particularly striking part of this (Old Testament law) system is that when an unclean person comes into contact with a clean person, that clean person then becomes unclean. Moral dirtiness is contagious.
Consider Jesus. In Levitical categories, he is the cleanest person to ever walk the face of the earth. He was the Clean One…
When Jesus, the Clean One, touched an unclean sinner, Christ die not become unclean. The sinner beame clean.
Dane Ortlund - American Pastor
From the book "Gentle and Lowly"