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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]].
 
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]].
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[[Category:Medicine]]
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