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宁夏自1991年首次证实存在肾综合征出血热（HFRS）以来，疫区由1个乡扩大到3县9乡（镇），病例逐年增多，由海拔1900m左右向2000m以上地区发展。这里是著名的六盘山地区，俗称黄土瀚海中的“湿岛”，降雨量为520～680mm，相对湿度达60～70%，植被覆盖率为80～90%，是许多进入黄
Since 1991, when Ningxia first confirmed the presence of hemorrhagic fever with renal syndrome (HFRS), the epidemic area expanded from one township to 9 counties (towns) in 3 counties. The number of cases has been increasing year by year, from about 1,900m above sea level to more than 2,000m. Here is the famous Liupanshan area, commonly known as the “wet island” in the Loess Sea, rainfall of 520 ~ 680mm, relative humidity of 60 to 70%, vegetation coverage of 80 to 90%, many are yellow