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为进一步探讨我市人群中甲型病毒性肝炎 (甲肝 )流行规律及免疫水平 ,科学地制定预防策略 ,现将 1991- 2 0 0 2年有关资料整理分析如下。1 材料和方法1 1 病例来源于全市各县 (市 )、区法定传染病常规报告系统 ,人口资料来源于市统计局。1 2 诊断标准甲肝病例按 1990年 5月?
To further explore the prevalence of hepatitis A (hepatitis A) in our population and the level of immunity, scientifically formulate prevention strategies, the data of 1991-2002 are summarized as follows. 1 Materials and methods 1 1 cases from all counties (cities), the district legal infectious diseases routine reporting system, population data from the Municipal Bureau of Statistics. 1 2 diagnostic criteria for hepatitis A cases by May 1990?