character: Dr. Sarah Lee
topic: Cells of the Immune System
grade: 12
subject: Biology
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character: T-Cells
topic: Types of Immune Cells
grade: 12
subject: Biology
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character: B-Cells
topic: Antibody Production
grade: 12
subject: Biology
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character: Macrophages
topic: Phagocytosis and Immune Response
grade: 12
subject: Biology
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