character: Dr. Alice Kim
topic: How Pathogen Recognition Receptors Work
grade: 9
subject: Biology
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character: Professor John Smith
topic: Immune System Basics
grade: 9
subject: Biology
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character: Dr. Emily Tran
topic: Innate Immunity Overview
grade: 9
subject: Biology
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character: Dr. Mark Chen
topic: The Role of Antibodies in Pathogen Defense
grade: 9
subject: Biology
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