Methods We analysized the incidence of mumps in Hongkou by means of comparing that before using MMR vaccine in 1992 ~ 1996 with that after using MMR vaccine in 1997 ~ 2005.
方法采用前后比较的方法，对虹口区疫苗接种前(1992 ~ 1996年)与疫苗接种后(1997 ~ 2005年)腮腺炎发病情况进行分析比较。
Meanwhile, among the diseases of mumps, the proporation of schoolmates after MMR vaccine ascended to 50% from 20% before MMR vaccine.
同时接种后腮腺炎病例中，学生比例由接种前的20%增加到50%；
Meanwhile, among the diseases of mumps, the proporation of schoolmates after MMR vaccine ascended to 50% from 20% before MMR vaccine.
同时接种后腮腺炎病例中，学生比例由接种前的20%增加到50%；
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