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Allergies

This animation shows the passage of allergens (pollen) into the nasal cavity. The body response includes the release of histamine, a chemical that produces allergy symptoms in the body.

Allergies

Review Date: 3/14/2016

Reviewed By: Stuart I. Henochowicz, MD, FACP, Associate Clinical Professor of Medicine, Division of Allergy, Immunology, and Rheumatology, Georgetown University Medical School, Washington, DC. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.

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