It's fascinating to look back and see how much knowledge there was of proper sanitation in the Old Testament. Jewish laws gave directions for how to tend to infections and how to clean food. Thousands of years ago before modern science told us these things, it was already known.
I know, isn't it cool? It's one of the things that I'm having a lot of fun playing with for the Bothare. When people talk about ancient knowledge, you can skip the star charts and stuff and go right to the fact that they figured out religious ways to create public health codes.