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于1987年4月和l988年3月,在安徽某县进行了HFRS隐性感染调查,发现混合型疫源地的隐性感染率为4.82%,介于野鼠型和家鼠型病源地之间,同时发现,HFRS隐性感染男、女间无性别差异;各年龄组均有隐性感染,但以20～50岁组为高;经过一个流行年度后,隐性感染似有上升趋势,且发现发病率的高低与该地人群隐性感染率高低相一致;家中有患者的正常人群隐性感染率高于家中无患者的人群。
In 1987 April and l988 in March, a county in Anhui conducted a survey of HFRS latent infection found that the mixed foci of latent infection rate of 4.82%, between wild-type and house-based origin , But also found that there was no gender difference in the latent infection of HFRS between men and women; all age groups had latent infection, but were higher in the group of 20 to 50 years old; latent infection seemed to be on the rise after one popular year Found that the incidence of the level of recessive infection in the population consistent with the level; at home with patients in the normal population of the hidden infection rate is higher than the family without the patient population.