Moses' writing also reveals a knowledge of deadly germs associated with dead bodies. Throughout history people stored and cooked their meat with ample spices to delay the rotting and to disguise the smell of decay. Without refrigeration, the eating of meat was often hazardous because of the danger of infection. God inspired Moses to record these medical and sanitation instructions in the Bible to protect the Israelites from deadly germs found in dead animals. An animal carcass found after natural death would be dangerous to eat because it would likely contain the germs that caused its death.
Infectious germs develop within hours of an animal killed by another animal.
The children of Israel were saved from germs and diseases by following these religious laws given by their God through Moses. Whoever in the open field touches one who is slain by a sword or who has died, or a bone of a man, or a grave, shall be unclean seven days. Germs from a dead human body are dangerous to humans. These deadly germs are everywhere, but especially within the bodies of those who are already sick or those who have died due to some disease. That gave time to see if the person got ill from touching the dead body.