新生儿的免疫系统处于特殊状态。一是正在发育的过程中。二是由子宫比较隔绝的环境移行到完全开放的环境,处于受到各种抗原的刺激而又必须处理这些抗原的适应时期。第三,在胚胎期存在着如何抑制同种免疫反应维持共生状态的适应机构,还可能有一部分同种免疫反应修饰免疫系统。这些情况与新生儿各种各样的临床问题有关系。即由于免疫系统尚未完成和为避开同种免疫反应存在的免疫抑制机制等,以致对微生物的侵入有不引起充分免疫应答的可 The newborn’s immune system is in a special state. One is in the process of development. Second, the relatively isolated environment from the uterus migrate to a completely open environment, in the stimulation by a variety of antigens and must deal with the adaptation of these antigens. Third, there are adaptive mechanisms in the embryo that can inhibit the same immune response to maintain the symbiotic state. Some immune responses may modify the immune system. These conditions are related to a variety of clinical problems in newborns. That is, because the immune system has not yet completed and to avoid the existence of immunosuppressive immune response mechanisms exist, so that invasion of microorganisms have not caused sufficient immune response may