作者首先回顾了有关免疫方面的资料,提到免疫的产生有两种途径:1.产生体液抗体;2.细胞免疫的形成。并着重指出人体免疫功能可以在淋巴结的形态学变化中反映出来,可出现某种特征性的组织变化。在细胞免疫的情况下,细胞与抗原的接触在淋巴结外,受了刺激的免疫活性细胞到达淋巴结后,即在其中增生,这些增生的细胞进 The author first reviewed the information on immunity, and mentioned that there are two ways to produce immunity: 1. Production of humoral antibodies; 2. Formation of cellular immunity. It is also emphasized that the human immune function can be reflected in the morphological changes of the lymph nodes, and some characteristic tissue changes may occur. In the case of cellular immunity, the contact between cells and antigens is outside the lymph nodes and the stimulated immunocompetent cells reach the lymph nodes where they proliferate. These proliferating cells enter