Objective: Investigate the infectious circumstance of hepatitis Virus in the patient with hemophilia after injecting a large amount of the cryofibrinogen for many time and present a new conception of detecting hepatitis virus through blood. 目的:探讨甲型血友病患者大剂量反复输注冷沉淀后,HBV和HCV的感染情况,从而提出加强血液检测的新构想。