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Individual eats the food that causes a reaction for the first time
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When the allergen is detected, the body creates an antibody to fight the substance.
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The antibodies cling to the foreign substance all over the body to prepare the body if it were to enter again.
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When the allergen enters the body again, the allergen bonds to the antibodies and sends signals to release more histamine.
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The histamine spreads throughout the body and begins to cause swelling and irritation.
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Irritation leads to further complications such as hives, shortness of breath, and death.