四、异常的免疫反应和免疫病(一)异常的免疫反应在病理状态下可以出现异常的免疫反应。有两种不同情况:一种是正常免疫反应的消失(无反应)或降低(低反应);另一种是免疫反应异常增高,叫做超敏反应,习惯上把它称为变态反应。无反应或低反应机体对抗原刺激不发生反应或反应性降低的现象,多半是非特异性的。这就是说,机体对 Fourth, the abnormal immune response and immune disease (A) Abnormal immune response Pathological conditions may appear abnormal immune response. There are two different situations: one is the disappearance of the normal immune response (no response) or reduced (low response); the other is an abnormal increase in immune response, called hypersensitivity, it is customary to call it an allergy. No reaction or low response to the body to stimulate the reaction does not react or reduce the phenomenon of the reaction, mostly non-specific. This means that the body is right