凤台县是流行性出血热老疫区和高发区，我们检测健康人血清２３７８份，阳性１１２份，阳性率为４．７％，提示高发区健康人群隐性感染高于其它地区。其中农民人群隐性感染率较高为６．４％，显著高于其它人群。 Fengtai County is endemic hemorrhagic fever epidemic area and high incidence area, we detected 2378 healthy human serum, positive 112, the positive rate of 4.7%, suggesting that the prevalence of latent infection in healthy people in high incidence areas than in other areas. Among them, the higher the latent infection rate of peasant population was 6.4%, which was significantly higher than other groups.