character: Professor John Smith
topic: Introduction to the Immune System
grade: 9
subject: Science
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character: Dr. Lisa Porter
topic: Understanding Antibodies and Vaccines
grade: 9
subject: Science
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character: Ms. Rachel Green
topic: The Role of White Blood Cells in Immunity
grade: 9
subject: Science
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character: Mr. David Brown
topic: How the Immune System Fights Infections
grade: 9
subject: Science
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