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Antigens

Antigens

Overview

An antigen is a substance that can provoke an immune response. Typically antigens are substances not usually found in the body.

Review Date 8/26/2017

Updated by: Linda J. Vorvick, MD, Clinical Associate Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.