As we struggle through the reading of the laws and regulations, imagine what a struggle it was for the people to keep the law.
Rom 7:6-7a
But now we having been set free from the Law, having died to that in which we were held, so that we serve in newness of spirit and not in oldness of the letter.  What shall we say then? Is the law sin? Let it not be said! But I did not know sin except through the law. 

In all the rituals concerning people with infectious diseases, leprosy, boils, burns, etc. there is no mention of a cure. They were simply separated from the general population. Jesus came with cures, not just for the physical but for the spiritual as well.

“You must keep the Israelites separate from things that make them unclean…”
If only we would keep ourselves separate from things that contaminate us.

2 Cor 7:1
Since we have these promises, dear friends, let us purify ourselves from everything that contaminates body and spirit, perfecting holiness out of reverence for God.Praise God, He sees us as "clean" through the blood of Jesus!