由于麻疹疫苗的确切作用，我国麻疹发病率下降明显，危害减弱，控制和消除麻疹危害成为现实。但目前在普遍施行计划免疫工作的情况下仍然有麻疹的流行，甚至暴发，特别在学校散发病例常见，年龄后移趋势明显，这些严重影响了麻疹的控制和消除规划。为了解加强免疫在预防麻疹流? Due to the exact role of measles vaccine, the incidence of measles in our country dropped significantly, the harm weakened, and the control and elimination of measles hazards became a reality. However, at present, the epidemic of measles is still widespread even under the planned immunization program. In particular, cases of measles are still common in schools. The trend of backward age is obvious. These have seriously affected the control and elimination of measles. To understand the strengthening of immunization in the prevention of measles?