【概念】变态反应这个术语对临床医生并不陌生。临床医生在日常工作中也许会遇到这样的情况,一些细菌感染在病人用青霉素治疗时,有时刚刚拔出注射针头,病人就面色苍白、四肢湿冷、血压下降,发生了过敏性休克。有些发热的病人服用退热药,数天后检查血象,发现粒细胞数明显减少。某些病孩的咽 [Concept] The term allergy is no stranger to clinicians. Clinicians may encounter such situations in their daily work. Some bacterial infections sometimes occur when the patient is treated with penicillin. Sometimes the patient has just been pulled out of the needle and the patient is pale, limbs are cold and cold, blood pressure drops, and anaphylactic shock occurs. Some fever patients taking antipyretics, check the blood after a few days and found that significantly reduced the number of granulocytes. Some sick children’s pharynx