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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 7/8/2023

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