免疫反应一个突出的特点就是它的特异性(专一性)。人们早就发现,对于自然界形形色色的抗原,机体都有相应的抗体与之反应。白喉毒素诱导的抗体只能和白喉毒素反应,伤寒杆菌诱导的抗体只能和伤寒杆菌反应。抗原任何微小的改变都可能诱导出一种新的抗体。机体这种高度特异的识别能力是从那里来的?它的物质基础是什么?实验证明,这种特异的免疫识别能力属于T、B淋巴细胞。T、B淋巴细胞所以能和外界抗 A prominent feature of the immune response is its specificity (specificity). It has long been discovered that for all kinds of antigens in nature, the body has the corresponding antibodies to react with it. Diphtheria toxin-induced antibodies only react with diphtheria toxins, and Salmonella typhimurium-induced antibodies respond only to Salmonella typhimurium. Any minor changes in the antigen may induce a new antibody. The highly specific recognition of the body came from there? What is its material basis? Experiments show that this specific immune recognition belongs to T, B lymphocytes. T, B lymphocytes so can be resistant to the outside world