病毒性肝炎(以下简称肝炎)传染性强、发病率高,危害程度重,是严重危害人体健康的重要传染病之一。我区自1960年有肝炎疫情报告以来到1989年三十年间,发病率居各种传染病的首位或第2位,年平均发病率为120.33/10万。三十年中先后发生过5次流行高峰,即1971年、1975年、1979年、1982年和1987年。以1975年、1987年为尤,发病率分别为691.79/10万和499.23/10万。约3～5年出现一次流行高峰,每次可持续1～2年。发病有明显的季节性,8月份发病上升,10～12月达高峰,至次年1月份下降。面对严峻的肝炎疫情形势,我区自1990年 Viral hepatitis (hereinafter referred to as hepatitis) contagious, high incidence, the degree of harm, is one of the major infectious diseases that seriously endanger human health. Since 1960, there was a hepatitis epidemic report in our district. In 1989, the incidence of hepatitis B was the highest or the second among all kinds of infectious diseases, with an average annual incidence of 120.33 / 100,000. Five popular peaks have occurred in thirty years, 1971, 1975, 1979, 1982 and 1987. In 1975, 1987, especially, the incidence rates were 691.79 / 100,000 and 499.23 / 100,000. Occurred in about 3 to 5 years a popular peak, each sustainable 1 to 2 years. The incidence of obvious seasonal, the incidence increased in August, reached a peak in 10 to December, the following year in January decreased. Faced with the severe situation of hepatitis outbreak, our district since 1990