character: Antigen Detective
topic: The Role of Antigens in Immunity
grade: 9
subject: Biology
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character: Immune System Expert
topic: How Antigens Trigger Immune Responses
grade: 9
subject: Biology
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character: Vaccine Developer
topic: Antigens in Vaccination and Immunization
grade: 9
subject: Biology
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character: Pathogen Researcher
topic: The Interaction between Antigens and Antibodies
grade: 9
subject: Biology
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