Occult HBV infection has been identified by sensitive PCR assays that may detect low levels of HBV DNA in the serum samples and/or liver of people who are HBsAg negative.

• 隐匿性HBV感染是指患者表面抗原阴性，但通过敏感的PCR方法可在患者血清和/或肝组织中检测到HBVDNA。