https://en.wikipedia.org/wiki/Medieval_bioarchaeology#
>>Anne L. Grauer, Professor of Anthropology at Loyola University Chicago, assessed the presence of porotic hyperostosis and periosteal reactions in the population (n=1,014) from St. Helen-on-the-Walls in York, England. She used porotic hyperostosis and periosteal reactions to examine health and disease in urban medieval England. Grauer discovered that 58% of the population displayed evidence of porotic hyperostosis and 21.5% displayed evidence of periosteal reactions.[6]
Without industrial civilization, the amount of labor people do is not sufficient for most of the comforts of modern life, like insulated and waterproof shelter, sanitary pads, diapers, vaccines, bandages, regular laundrying of clothing, etc etc.