目的大面积接种甲型肝炎（甲肝）疫苗，建立群体免疫屏障，控制甲肝周期性流行效果评价。
Objective To build the colony immune defence and to control the periodic epidemics of hepatitis A after a mass vaccination of live attenuated hepatitis A vaccine.
结论建立学校学生人群的免疫屏障与加强农村群体聚餐的食品卫生监督监测将有利于突发公共卫生事件的预防与控制。
Conclusion It is necessary to strengthen the immunization among students and food safety surveillance in rural area to prevent and control public health emergency.
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