character: Antigens
topic: Role of Antigens in Immune Response
grade: 10
subject: Biology
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character: B cells
topic: Antibody Production
grade: 10
subject: Biology
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character: T cells
topic: Cell-mediated Immunity
grade: 10
subject: Biology
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character: Pathogens
topic: Identification by Immune System
grade: 10
subject: Biology
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