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根据我省1997、1998年法定传染病报告,我省病毒性肝炎发病率明显高于往年,为了搞清发病率升高的原因,发病的特点和流行趋势,我们通过1990~1998年疾病监测资料,对我省病毒性肝炎发病情况进行了动态分析。1.1990~1998年病毒性肝炎发病率的动态?
According to the report on notifiable infectious diseases in 1997 and 1998 in our province, the incidence of viral hepatitis in our province was significantly higher than in previous years. In order to find out the reasons for the rising incidence and the characteristics and prevalence of the disease, we passed the disease surveillance data from 1990 to 1998 , The incidence of viral hepatitis in our province conducted a dynamic analysis. 1 from 1990 to 1998 the incidence of viral hepatitis dynamic?