人类由此开始发展起复杂的免疫系统,使其能够与入侵者一起生存下来。早期的农民,特别是他们的孩子,一直面对着来自土壤粪便污染的钩虫,以及可能来自猪的蛔虫的威胁。这些寄生虫联合侵袭人体,在肠道内与宿主争夺蛋白质,导致贫血症。人们则在与这些疾病的抗争中,被剥夺 As a result, humans began to develop a complex immune system that allowed them to survive with intruders. Early farmers, especially their children, have been facing hookworms that are contaminated with soil faeces and the threat of roundworms that may come from pigs. Together, these parasites attack the body and compete with the host for proteins in the gut, leading to anemia. People are deprived of their fight against these diseases