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在1991年至1992年间，我县学生甲型肝炎（简称甲肝）发病率一直持续在4800．53／10万～5697．63／10万。为及时控制甲肝的传播流行，形成群体的免疫屏障，我们分别于1993年和1994年对全县8万余名学生进行了甲肝疫苗的集体应急接种，接种率在75％以上，并取得了一定的免疫效果。
Between 1991 and 1992, the incidence of hepatitis A (A) in our county continued from 4800.53 / 100000 to 5697.63 / 100000. In order to control the spread of hepatitis A in time and form a group of immunological barriers, we conducted a collective emergency vaccination of more than 80,000 students on hepatitis A vaccine in 1993 and 1994 respectively, with a vaccination rate above 75% and achieved certain The immune effect.