重症病毒性肝炎包括急性重症型和亚急性重症型,可由多种病毒所致。除甲型、乙型、非甲非乙型肝炎病毒外,还可由疱疹病毒、巨细胞病毒等引起,是病毒性肝炎的危重类型,病死率极高。据报道Ⅳ级或Ⅴ Severe viral hepatitis, including acute and sub-acute severe type, can be caused by a variety of viruses. In addition to A, B, non-A non-B hepatitis virus, but also by the herpes virus, cytomegalovirus and other causes, is a critical type of viral hepatitis, high mortality. It is reported that Ⅳ or Ⅴ