As a etiologic agent, the persistence of HCV in extrahepatic tissues may take an important role in the relapse as well as the chronicity of hepatitis C after discontinuation of interferon therapy.

• 作为致病因子的HCV持续存在肝外多种脏器细胞内，在丙型肝炎慢性化和干扰素治疗后病情复发中可能起重要作用。