Deuteronomy 7:15

And the Lord will take away from you all sickness, and will put none of the evil diseases of Egypt, which you know, on you, but will put them on all them that hate you.

This is a great verse because The Lord is promising to take away sickness from the people. It is interesting why he would put them on our enemies because then their is a possibility of getting the diseases again from the enemy. Modern diseases may be ancient diseases from long ago. We have to truly get to know the Lord so we know what he would do and not do. I have never known anyone who knows exactly where the Bible comes from except by asking another person. It is always good to do the good things in the Bible is my opinion but keep an open mind to some of the confusing points in the Bible.