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免疫是机体的一种保护性生理功能,其作用是“识别”和排除抗原性异物,以维持机体内环境的平衡和稳定。免疫对机体具有防御感染、自我稳定和免疫监视三大功能。免疫可分为非特异性免疫和特异性免疫两种。
Immunization is a protective physiological function of the body, its role is to “identify” and eliminate antigenic foreign body to maintain the balance and stability of the body environment. Immune to the body with a defensive infection, self-stability and immune surveillance of the three major functions. Immunity can be divided into two kinds of non-specific and specific immunity.