character: Dr. Sarah Lee
topic: Types of White Blood Cells and Their Functions
grade: 11
subject: Science
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character: Dr. Alex Cruz
topic: Immune Response Mechanisms
grade: 11
subject: Science
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character: Ms. Jessica Wong
topic: Functions of the Immune System
grade: 11
subject: Science
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character: Mr. David Tran
topic: Overview of Blood Components
grade: 11
subject: Science
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