乙型肝炎是病毒肝炎中传播最广，对人类健康危害最大的世界性传染病。我国又是乙型肝炎病携带者的高发区。大庆中学面向全市招生，学生95％寄宿。由于大庆市是石油工业城市，居民居住分散，城乡无明显分界，给此病的预防、治疗带来了困难。我们于1994年9月至1998年9月开始，重 Hepatitis B is the most widely spread viral hepatitis, the most harmful to human health worldwide infectious disease. China is another high incidence of hepatitis B carriers. Daqing secondary school enrollment for the city, 95% of boarding students. As Daqing City is an oil-industrial city, residents are scattered and there is no obvious boundary between urban and rural areas, which has brought difficulties in the prevention and treatment of this disease. We started in September 1994 to September 1998 and weighed heavily