20世纪 60年代以后出现的肿瘤免疫疗法 ,其作用机制主要是通过刺激机体的免疫系统如淋巴系统等 ,使机体的免疫功能得到恢复和提高 ,以提高机体本身的抵抗力去杀死肿瘤细胞。因为它是间接的作用 ,所以对机体毒副作用小。应用于免疫疗法的药物很多 ,其中多糖是重要的一类。云芝糖 The tumor immunotherapy that emerged after the 1960s mainly through the stimulation of the body’s immune system such as the lymphatic system, so that the body’s immune function is restored and improved to enhance the body’s own resistance to kill tumor cells. Because it is an indirect effect, it has little side effects on the body. There are many drugs used in immunotherapy, of which polysaccharides are an important class. Yunzhi Sugar