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Allergy - Wikipedia, the free encyclopedia
An allergy is a hypersensitivity disorder of the immune system. Allergic reactions occur when a person's immune system reacts to normally harmless substances in the ... http://en.wikipedia.org/wiki/Allergy |
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Allergies: Symptoms & Types
Sneezing, difficulty breathing, cramps, and vomiting–all are allergy symptoms. Learn the types of allergies, specific allergy symptoms, and emergency warning signs. http://www.webmd.com/allergies/guide/al... |
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Allergies -- Allergy
Allergies are more common than ever, affecting up to 1 in 3 people. From basic concepts to in-depth discussion of specific allergic diseases, a board ... http://allergies.about.com/ |
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Allergies: MedlinePlus Medical Encyclopedia
An allergy is an exaggerated immune response or reaction to substances that are generally not harmful. Allergies are pretty common. Both genes and ... http://www.nlm.nih.gov/medlineplus/ency... |
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