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为探讨兰州铁路地区病毒性肝炎发病和流行病学特征,现对1900～2006年发病情况进行分析。1材料与方法兰州铁路地区有居民170608人,1990～2006年法定传染病报告系统所报病例,均经医疗单位诊断,并
In order to explore the incidence and epidemiological characteristics of viral hepatitis in Lanzhou Railway Region, the incidence of the disease from 1900 to 2006 was analyzed. 1 Materials and Methods 170,608 residents of Lanzhou Railway area, 1990-2006 reported cases of notifiable infectious diseases reporting system, are diagnosed by medical units and