character: Dr. Smith
topic: The Role of White Blood Cells in Immunity
grade: 9
subject: Biology
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character: Ms. Johnson
topic: The Immune Response Mechanism
grade: 9
subject: Biology
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character: Mr. Lee
topic: Types of White Blood Cells and Their Functions
grade: 9
subject: Biology
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character: Dr. Patel
topic: How Vaccines Stimulate the Immune System
grade: 9
subject: Biology
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