The Book of Leviticus in the Bible was probably the first recording of laws concerning public health. The Hebrew people were told to practice personal hygiene by washing and keeping clean. They were also instructed to bury their waste material away from their campsites, to isolate those who were sick, and to burn soiled dressings. They were prohibited from eating animals that had died of natural causes. The procedure for killing an animal was clearly described, and the edible parts were designated.
Gwendolyn R.W. Burton and Paul G. Engelkirk, Microbiology for the Health Sciences, 6th Edition (New York, NY: Lippincott, Williams & Wilkins, 2000), 9.