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许多证据指出,免疫系统的功能随年龄增长而逐渐降低。有人发现,衰老与迟发型皮试反应,淋巴细胞对致裂原及抗原的转化应答、抗原刺激后淋巴因子的生成以及细胞介导的细胞毒作用等能力降
Much evidence suggests that the immune system’s function decreases with age. It was found that the ability of aging and delayed type skin test reactions, lymphocyte response to the conversion of the antigen and antigen, antigen-induced lymphokine production and cell-mediated cytotoxicity was reduced