James Harrison's Article in Health and Fitness
1095
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The 10 most common allergens that can cause an allergy
More than one fifth of all Americans suffer from one form of allergy or another. Allergies occur in some people when their immune system reacts abnormally to a substance they encounter in the environment known as an allergen. An allergen is any substance that can cause an allergy.
Posted on Jul-27-2010
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