descriptive epidemiology造句怎么写

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

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.