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泗阳县1966年开始使用麻疹减毒活疫苗（以下简称麻苗），1979年纳入儿童计划免疫程序，麻疹发病率大幅度下降．为掌握麻疹流行规律，进一步控制疫情，现将泗阳县1957～1995年麻疹流行特征分析如下．1流行特征1．1发病率呈阶段性下降。从三个年段麻疹平均发病率的变化来看，1966
In 1966, Siyang County started to use live attenuated measles vaccine (hereinafter referred to as “Ma vaccine”). In 1979, it included the program of immunization for children, and the incidence of measles dropped drastically. In order to grasp the epidemic of measles and further control the outbreak, the epidemic characteristics of measles in 1957-1995 in Siyang County are as follows. A prevalence of 1.1 The incidence was phased decline. From the three-year average change in the incidence of measles, 1966