The hygiene laws were centuries ahead of science that discovered germs.Well, we need go no further then.
Put down that keyboard pronto and return poste haste to the Bible which must contain the answer(s) to your quest (IOW, why are you here? Simply to answer our questions ... or yours?)
The point was a refutation of the claims by eagle74 that the Bible was written by primitive men who believe that demons caused illness. Science discovered the why of the hygiene laws in the Bible. Im not dismissing science only eagle74’s ignorance of what the Bible contains.