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Nasal AllergiesImage

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  Recognizing invader


An allergy occurs when the immune system reacts to substances (allergens) that are generally harmless and in most people do not cause an immune response. Antibodies are formed by the immune system in response to the presence of an antigen such as pollen, mold, dust or dander.
This image found in these articles:
  1. Allergic rhinitis
Update Date:
October 30, 2006
Donald Accetta, MD, MPH, President, Allergy & Asthma Care, PC, Taunton, MA. Review provided by VeriMed Healthcare Network.
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