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+ Allergies, also known as allergic diseases, are a number of conditions caused by hypersensitivity of the immune
+ system to typically harmless substances in the environment. These diseases include hay fever, food allergies,
+ atopic dermatitis, allergic asthma, and anaphylaxis. Symptoms may include red eyes, an itchy rash, sneezing,
+ coughing, a runny nose, shortness of breath, or swelling.
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