It goes even deeper if you get into Judaism and why they have two entirely separate kitchens. Ancient people dying of trichinosis in the desert heat but not understanding how disease functions do weird things to try to figure out how to safely survive, like banning certain foods entirely such as shellfish.

Diarrhea is still one of the top killers of children worldwide, which is one of the main side effects of food-borne illnesses like trichinosis.