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Someone eats an allergen, but does not react to it.
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An antibody is formed and attaches itself to cells found in the tissues in cells all over the body.
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The person eats the same food once, again, but now causes an allergic reaction for the first time.
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The allergen connects to the antibodies.
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Your body reacts to the substance and that is when you show signs of the allergic reaction.
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Your body then sends out signals that tell your body to let out large amounts of histamine.
