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ALLERGY :is the immune system's reaction to unfamiliar substances like…
ALLERGY :is the immune system's reaction to unfamiliar substances like poison 
the immune system produces proteins called antibodies that protect the body from inwanted foreign bodies and most of allergies appears on the skin
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Pollen granules ,animal dander ,dust mites , mold
Some foods espicially hazelnuts , walnuts ,wheat , soy beans ,fish 🐟...ect
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Some medications 💊 , espacially penicillin
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