为及早发现乙型肝炎传染源，采取有效措施控制乙肝病毒的传播，于1990年8－10月对我县4所中等学校学生进行了HBsAg检测。1对象与方法1．1对象：以依安县第三中学走读生830名，师范学校在校食宿生1100名，实验中学1010名，技工学校434名（后两校走读生和在校食宿生兼有），共337 In order to detect the source of hepatitis B as early as possible and take effective measures to control the spread of hepatitis B virus, HBsAg was detected in 4 middle school students in our county from August to October in 1990. 1 Subjects and Methods 1.1 Subjects: 830 third-year high school students in Yi’an County, 1,100 normal school students in boarding schools, 1010 experimental high schools, 434 technical schools (the latter two school students and the school accommodation Students have both)