经典遗传学极大地推动了人们对先天代谢病的认识,经典流行病学是人们认识环境引起的疾病的必不可少的学科,而遗传流行病学对了解大量的慢性退行性疾病起着相当重要的作用。随着遗传-环境相互作用知识的增长,遗传流行病学对扩大象营养学等类学科的知识领域以及发展医药学、公共卫生政策的新方向有着巨大潜力。公共卫生学最初的发展是为了阐明环境引起的疾病,如:传染病、营养缺陷病以及龋齿等。在人类所有个体,这些疾病都是易感的,但易感性有个体差异。象疾病本身一样,大部分个体差异是环境引起的,遗传起因的只占一小部分。在某个健康群体中,大多 Classical genetics has greatly promoted people’s understanding of innate metabolic diseases, and classical epidemiology is an indispensable subject for people to recognize environmental-induced diseases. Genetic epidemiology is very important for understanding a large number of chronic degenerative diseases Role. As knowledge of the genetic-environmental interaction grows, genetic epidemiology has great potential to expand knowledge areas such as nutrition and other disciplines and to develop new directions in medicine and public health policy. The initial development of public health was to clarify the environment caused by diseases such as: infectious diseases, nutritional deficiencies and dental caries. These diseases are susceptible to all human beings, but there are individual differences in susceptibility. Like the disease itself, most individual differences are caused by the environment, and genetic causes account for only a small proportion. In a healthy group, mostly