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黑龙江省农垦地区（以下简称垦区）是HFRS高发病区。为有针对性地引进疫苗，对垦区HFRS疫区类型进行了调查研究。1材料与方法1．1HFRS疫情资料来源于垦区各级卫生防疫站的疫情统计报表。1.2病人血清来源于垦区1995年未接种疫苗的HFR现症病人。病人血清分型采用血凝抑制法（HI）
Heilongjiang Land Reclamation Area (hereinafter referred to as reclamation area) is a high incidence of HFRS. In order to introduce the vaccine specifically, the type of HFRS in reclamation area was investigated. 1 Materials and methods 1.1HFRS epidemic information from the epidemic prevention and epidemic prevention stations at all levels of reclamation statistical reports. 1.2 patient serum from reclamation 1995 unvaccinated HFR patients. Serological typing of patients with hemagglutination inhibition (HI)