Objective To understand the condition of alanine transaminase(ALT) and virus replication in asymptomatic persons whose HBsAg were positive.

• 目的了解无症状乙型肝炎表面抗原(HBsAg)阳性者丙氨酸转氨酶(ALT)及乙型肝炎病毒复制的情况。