Sanitation (specifically the lack of) is a major reason why we do not get sick and die as young.
500 years ago, clean water was not plentiful, so you'd drink from improperly made wells with no measure of when you were sick until you were so riddled with parasites that retaining water was difficult because of all the sweating, diarrhea and vomiting.
Aside from just sanitized water, there are many modern day sanitization practices, such as not going to the bathroom where you eat, washing your hands, refrigeration as well as better food handling protocol.
Sanitation (specifically the lack of) is a major reason why we do not get sick and die as young.
500 years ago, clean water was not plentiful, so you'd drink from improperly made wells with no measure of when you were sick until you were so riddled with parasites that retaining water was difficult because of all the sweating, diarrhea and vomiting.
Aside from just sanitized water, there are many modern day sanitization practices, such as not going to the bathroom where you eat, washing your hands, refrigeration as well as better food handling protocol.