an abnormal reaction by the body when exposed to an allergen, such as sneezing, rashes, or anaphylaxis; also called [[过敏|過敏|guo4 min3]], [[过敏反应|過敏反應|guo4 min3 fan3 ying4]], or in Mainland China [[变态反应|變態反應|bian4 tai4 fan3 ying4]]

an allergic disease or condition, such as hypersensitivity or anaphylaxis