１９９８年３月２日至４月２０日，涡阳县曹市镇发生一起以中、小学校在校学生为主的麻疹暴发流行。此次麻疹暴发流行历时５０天，共发病３７例，罹患率为９５１％（３７／３８９）。患者主要集中在该镇一所初级中学和相邻的一所小学。发病最小年龄７岁，最大１６岁，１... From March 2 to April 20, 1998, an outbreak of measles-based outbreak of school-based measles in primary and secondary schools occurred in Cao Town, Guoyang County. The measles outbreak epidemic lasted 50 days, a total of 37 cases of disease, the attack rate was 951% (37/389). Patients are mainly concentrated in the town of a junior high school and adjacent to a primary school. The minimum age of onset of 7 years old, up to 16 years old, 1 ...