character: Microbiologist
topic: Role of Antigens in Vaccine Development
grade: 9
subject: Biology
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character: Immunologist
topic: Types of Antigens and Their Importance
grade: 9
subject: Biology
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character: Vaccine Researcher
topic: How Antigens Trigger Immune Responses
grade: 9
subject: Biology
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character: Public Health Official
topic: Impact of Vaccines on Disease Prevention
grade: 9
subject: Biology
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