自30年代初发现首例肾综合征出血热（HFRS）病人至今，总的流行趋势是：老的疫区逐渐扩大，新的疫区不断出现，城市病例相对增多，流行强度逐渐升级。现将近10余年本病流行情况分析如下：一、流行趋势：见附表。二、80年代以来发病率的年度波动：见附图。三、流行强度：80年代 Since the beginning of the 1930s, the first HFRS patients were found. The general epidemic trends are as follows: the old epidemic area is gradually expanding, new epidemic areas are emerging constantly, the number of urban cases is relatively increased, and the epidemic intensity is gradually upgraded. Now nearly 10 years of epidemiological analysis of the disease are as follows: First, the trend: See Schedule. Second, the annual fluctuations in the incidence since the 1980s: See the attached figure. Third, the prevalence of intensity: 80 years