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麻疹是麻疹病毒引起的急性呼吸道传染病。主要发生在小儿(5岁以下小儿发病率占全部发病数的90％)故称小儿麻疹。1996年以后,由于麻疹疫苗的广泛接种,儿童麻疹发病率明显下降;但成人麻疹多起来了,成为成年人的儿科病。北京地区接种麻疹疫苗前7岁以下儿童麻疹发病率为96.7％,成人麻疹发病率仅为0.2％;而接种麻疹疫苗后7岁以下儿童发病率降为58.9％,成人发病率则升为15.7％。上海接种麻疹疫苗前成人麻疹发病率占0.89％,而1998—1989年成人麻疹发病率达48.1％。在麻疹暴发流行中成人麻疹也占
Measles is an acute respiratory infection caused by measles virus. Occurs mainly in children (5 years of age children less than 90% of the total number of incidence) so called measles. After 1996, the incidence of measles in children has dropped significantly due to the widespread immunization of measles vaccine; however, adult measles has increased and become a pediatric disease in adults. The incidence of measles in children under 7 years old in Beijing was 96.7% before measles vaccination in Beijing, and the incidence of measles in adults was only 0.2%. However, the incidence of measles vaccine in children under 7 years old dropped to 58.9% and that of adults was 15.7% . The incidence of adult measles before taking measles vaccine was 0.89% in Shanghai, while the incidence of adult measles in 1998-1989 was 48.1%. Adult measles also accounts for the measles outbreak