character: Professor John Smith
topic: Immune System Basics
grade: 9
subject: Biology
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character: Dr. Emily White
topic: Antibodies and Their Functions
grade: 9
subject: Biology
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character: Professor David Lee
topic: The Role of White Blood Cells in Immunity
grade: 9
subject: Biology
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character: Ms. Sarah Green
topic: How Vaccines Work to Protect the Immune System
grade: 9
subject: Biology
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