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麻疹是一种严重危害儿童健康的急性呼吸道传染病。据世界卫生组织估计，疫苗前时代，全世界每年大约有１．３亿儿童发病．７００万～８００万儿童死亡（１）。７０年代中期以来，由于扩大免疫规划活动的开展，麻疹疫苗接种率逐年提高；９０年代以来，全球１岁以内。儿童疫苗接
Measles is an acute respiratory infection that seriously affects children’s health. According to WHO estimates, in the pre-vaccination era, about 130 million children worldwide were affected each year. 7 million to 8 million children dead (1). Since the mid-1970s, measles vaccination rates have been increasing year by year as a result of the expansion of immunization programs. Since the 1990s, the world has been under 1 year of age. Child vaccination