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.
Review Date: 06/29/2010
Reviewed By: Paula J. Busse, MD, Assistant Professor of Medicine, Division of
Clinical Immunology, Mount Sinai School of Medicine, New York, NY.
Review provided by VeriMed Healthcare Network. Also reviewed by
David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org)
