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An allergy is an immune system reaction to a substance that is normally harmless. Substances that commonly cause allergic reactions include insect bites, food, plants, animals, chemicals, and medications.
Allergy symptoms may be different for people of different ages and can range from colic and diarrhea in babies and sneezing or depression in adults.
With testing, your physician can determine the source of your allergy. Many allergies can be treated with medication that makes them manageable.
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