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随着医学科学技术的发展,人类对疾病的认识不断提高,与疾病作斗争的手段也不断发展和完善。一些已经认识了的病通过斗争逐渐地得到控制和消灭,而一些新的疾病又不断地发现和流行,从而影响了各时期疾病谱的变化,随之而来的是与疾病作斗争的战略策略的变化。流行病学的定义、任务、
With the development of medical science and technology, human understanding of the disease continues to increase, and the means of combating the disease have also been continuously developed and improved. Some known diseases are gradually brought under control and eliminated through the struggle. Some new diseases are continuously discovered and popularized, which has affected the changes of the disease spectrum in each period, followed by the strategic strategy of combating the disease The change. Epidemiological definitions, tasks,