“descriptive epidemiology”簡單造句，descriptive epidemiology造句子

Method:The epidemic situation of intestinal infection from 1990 to 2004 in Zhengzhou were analyzed by descriptive epidemiology method.

WHO will continue to request that these countries report the first confirmed cases and, as far as feasible, provide weekly aggregated case numbers and descriptive epidemiology of the early cases.

Methods The data about HFMD in Xuchang from 2009 to 2010 were collected, and then analyzed by descriptive epidemiology method.