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!