One of the strain of bivalent HFRS vaccine, Z37 strain was isolated from Rattus norvegicus and identified as SEO virus by serological test.

• 汉坦病毒Z37株是从褐家鼠体内分离到的,用于生产双价肾综合征出血热疫苗的病毒毒株之一,血清分型为SEO型。