Allergic disease is different from the characteristics of other diseases, there is the first and ordinary people of different reactions, for example, in a family or group, eating the same food such as seafood allergies may occur pharyngeal itching, coughing, while others Failed to respond to the second is obviously the specificity, also known as repeatability, such as allergic rhinitis, allergic asthma, often in the Spring and Autumn onset of pollen season, some people eat fish and shrimp will appear every urticaria;

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