献血者乙型肝炎表面抗原的常规筛选,已显著降低了输血传播的乙型肝炎发病率。而目前,非甲非乙型肝炎在美国和欧洲,至少占输血后肝炎病例的90％、散发病例的20％以上。由于非甲非乙型输血后肝炎很普遍,因此,推测人群中存在大量的病毒携带者,因缺乏适当的诊断学试验,无症状的携带者,只有在其血液导致受血者发病,并排除其它肝炎后,才能作出诊断。 Routine screening of hepatitis B surface antigen in blood donors has significantly reduced the incidence of hepatitis B transfusion. At present, non-A non-B hepatitis in the United States and Europe, accounting for at least 90% of cases of post-transfusion hepatitis, sporadic cases of more than 20%. Because non-A, non-B hepatitis is very common, it is assumed that there are a large number of virus carriers in the population. Due to the lack of appropriate diagnostic tests, asymptomatic carriers, and only when their blood causes the recipient’s disease, After other hepatitis, can make a diagnosis.