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On the first day a person eats an allergen( Peanuts, Dairy etc...)
and the allergen causes an allergic reaction. -
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When the allergen enters the body the body creates what is called an atibody and it detects anything that is harmful to the body.
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The antibodies attaches to tissue cells to help the body to be prepared in case another allergen enters the body.
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When another allergen enters the body the antibody sends out signals to release histamine.
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The hismatime makes the person's body parts to swell or become itchy.
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A person can get hives, shortness of breath from the irritation it depends on what the persons immune system is like some people the allergic reaction last for only a few days but some gets worst and need serious medical attention.
