机体的过敏有些人吃了某些食物如草莓或是鱼虾、荞麦、巧格力等等以后,就会出现皮疹。有的人吸入某些花粉后就会发生鼻炎或喘息。这是由于这种人对该食物敏感所引起的。这种现象在医学上叫“变态反应”。能引起变态反应的东西叫“致敏原”。变态反应究竟是怎样产生的呢?这同抗体和免疫现象有关。有些传染病可以使人得到不同程度的免疫性。得了这种传染病以后就具有一定的抵抗力,在一定时 Allergies in the body Some people may eat rashes after eating certain foods such as strawberries or fish, buckwheat, or chocolate. Some people get rhinitis or wheezing after inhaling some pollen. This is due to the sensitivity of this person to the food. This phenomenon is called “allergy” in medicine. The thing that can cause allergic reactions is called “allergen.” How does allergies come about? This is related to antibodies and immune phenomena. Some infectious diseases can give people varying degrees of immunity. After getting this epidemic, it has a certain resistance, at a time