During the last two decades, the existence of a blood-borne virus responsible for non-A, non-Bhepatitis was suspected but not identified.
在过去二十年里，存在通过血液传染的病毒负责非甲非乙型肝炎怀疑但尚未确定。
2
Objective To investigate the effects of anti-HBV specific active immunotherapy on non-responsive persons immunized with standard recombinant hepatitisB vaccine.
目的探讨抗HBV特异性主动免疫疗法对标准重组乙型肝炎（乙肝）疫苗无应答者的免疫效果。
3
Conclusion Anti-HBV specific active immunotherapy shows a certain efficacy for non-responders immunized with standard hepatitisB vaccine.