have you ever read a book called "none of these diseases" ?
it is based on God's promise to the Hebrews in Exodus 15:26
And [the Lord] said, If thou wilt diligently hearken to the voice of the Lord thy God, and wilt do that which is right in his sight, and wilt give ear to his commandments, and keep all his statutes, I will put none of these diseases upon thee, which I have brought upon the Egyptians: for I am the Lord that healeth thee.
it has an entire chapter on plumbing and what it did for the public health of London
