我市大丰县位于里下河地区,东濒黄海,境内有大面积滩涂。近年流行性出血热(EHF)发病较高,且呈上升趋势。1991年,全县发病293人,发病率达364/10万,属省内高发区之一。该县有乡镇29个,发病的28个,占96.55%;其中年发病率为50～100/10万和>100/10万的乡镇各3个。该县 Dafeng County in the city is located in the Lixiahe area, east of the Yellow Sea, the territory of a large area of ​​beach. In recent years, the incidence of epidemic hemorrhagic fever (EHF) is high, and is on the rise. In 1991, the county incidence of 293 people, the incidence rate of 364/10 million, is one of the high incidence areas in the province. There are 29 townships and townships in this county, with 28 incidences accounting for 96.55%. Among them, there are 3 villages and towns with annual incidence rates of 50-100 / 100,000 and> 100 / 100,000. The county