过去讨论免疫问题仅考虑其预防传染病方面的作用。近十多年来认识到免疫功能不仅能防止异物的感染,而且有免疫监护作用,可防止机体内的突变细胞及肿瘤的生成,并能识别移植的外来组织,对自体有平衡稳定的作用。20年来免疫药物的研究达到了新的高潮。人们在细菌及其产物中筛选寻找有效的细菌制剂并进行活性成分的分离、纯化及结构改造;其次,随着免疫调节机制的深入研究,对胸腺素、转移因子及免疫球 In the past, the issue of immunization was only considered in the prevention of infectious diseases. Over the past decade to recognize the immune function not only to prevent foreign body infection, but also immune guarding effect, to prevent the body of mutated cells and tumors, and can identify foreign tissue transplanted to the balance and stability of the body. The study of immunosuppressive drugs has reached a new upsurge in the past 20 years. People in the bacteria and their products screening for effective bacterial preparations and the active ingredient separation, purification and structural transformation; Second, with the immune regulatory mechanism in-depth study of thymosin, transfer factor and immunoglobulin