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New page: Antigens are foreign substances (e.g. bacteria or viruses) in the body that are capable of causing disease. The presence of antigens in the body triggers an immune response, usuall...
Antigens are foreign substances (e.g. [[bacteria]] or [[viruses]]) in the body that are capable of causing disease. The presence of antigens in the body triggers an immune response, usually the production of [[antibodies]].