character: Dr. Smith
topic: Basics of Cellular Immunity
grade: 9
subject: Biology
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character: Ms. Johnson
topic: Introduction to the Immune System
grade: 9
subject: Biology
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character: Mr. Lee
topic: Understanding T-Cells and B-Cells
grade: 9
subject: Biology
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character: Dr. Nguyen
topic: The Role of Antigens in Immunity
grade: 9
subject: Biology
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