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1997年春,鹿城区出现了甲型肝炎流行,为了查明流行因素,以便及时采取针对性的防制措施,控制肝炎流行,我们进行了传播因素病例对照调查,现将调查结果报告如下。
In the spring of 1997, there was a hepatitis A epidemic in Lucheng District. In order to find out the epidemic factors in order to timely take targeted prevention and control measures to control the hepatitis epidemic, we conducted a case-control survey of transmission factors. The findings are reported as follows.