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我镇是姜堰市市政府所在地,1994年起接种甲肝疫苗,资料来源于我镇近年甲型肝炎情况调查,发现该病在年龄分布上出现新的特征,现报告如下。l 材料与方法1.1 材料 资料来源于我镇1989~1999年甲型肝炎病人的流行病学个案调查资料。1.2 方法 将病人分为两个
My town is located in Jiangyan city hall, vaccinated hepatitis A vaccine since 1994, the data from the survey of hepatitis A in our town in recent years, found that the disease in the age distribution of new features, are as follows. l Materials and Methods 1.1 Materials The data are from the epidemiological investigation of hepatitis A patients in our town from 1989 to 1999. 1.2 Methods The patient is divided into two