自实施计划免疫以来 ,中山市麻疹发病率大幅度下降 ,但近年来仍有麻疹散发病例及爆发点 ,特别是外来人群占总发病数的 70 %左右。为了解人群麻疹抗体水平 ,于 2 0 0 1年 12月 ,分别对常住人群及外来人群麻疹抗体水平进行了监测 ,现将结果报告如下。1　材料与方法1 1　对象　选 Since the implementation of the immunization program, the incidence of measles in Zhongshan has dropped dramatically. However, there are still cases of measles excretion and outbreaks in recent years. In particular, the number of foreign residents is about 70% of the total number of measles cases. In order to understand the level of measles antibody in the population, the level of measles antibody in resident population and non-native population was monitored respectively in December 2001 and the results are reported as follows. 1 Materials and Methods 1 1 object selection