T淋巴细胞对多数抗原的免疫应答的调节起着十分重要的作用.抗原提呈细胞表面存在着主要组织相容性基因复合体编码的分子(Ia或DR),T细胞只识别与这些分子相关连的抗原.T细胞受抗原刺激后,增殖并分泌一些因子,这些因子增强或抑制免疫效应分子和细胞(如抗体和细胞毒性T淋巴细胞)的产生.和大多数感染性疾病一样.对乙型肝炎病毒(HBV)的抵抗主要是靠保护性抗体和免疫效应细胞.急性乙肝病毒感染后恢复的机体,由于产生了抗病毒外膜分子即HBsAg的抗体,便获得了对HBV的免疫性.事实上,使用灭活并纯化的HBsAg制剂,已 T lymphocytes play a very important role in the regulation of the immune response of most antigens.The molecules (Ia or DR) that are encoded by the major histocompatibility gene complex on the surface of antigen presenting cells recognize only those molecules that are associated with these molecules T cells are stimulated with antigens to proliferate and secrete a number of factors that enhance or inhibit the production of immune effector molecules and cells (such as antibodies and cytotoxic T lymphocytes), as is the case with most infectious diseases. Hepatitis B virus (HBV) resistance mainly by protective antibodies and immune effector cells.Acute hepatitis B virus recovery after the body, due to the production of antiviral outer membrane molecules or HBsAg antibodies, they have acquired immunity to HBV. In fact, the use of inactivated and purified HBsAg preparations has been