find an old cemetery and browse, there was a reason they had so many kids back then cause making it to adulthood was an accomplishment not achieved by all
lol yeah that's cuz most people lived in shacks and drank poop water. How well do your graphs correlate with water treatment plants and refrigeration?
If the general level of a population's immune system is compromised because of poor nutrition, it wouldn't be unreasonable to assume they'd have a higher incidence of diseases.