AllRefer Health - Recognizing Invader (Pictures, Images, Photos, Diagrams, & Illustrations)

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Recognizing Invader

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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.

Related Images

• Allergic Rhinitis
• Allergy Symptoms

• Allergic Rhinitis

Review Date : 7/8/2002
Reviewed By : A.D.A.M. Medical Illustration Team

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