character: Mr. Brown
topic: Infections and the Body's Defense Mechanisms
grade: 11
subject: Science
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character: Dr. Smith
topic: Immune System Functions
grade: 11
subject: Science
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character: Ms. Johnson
topic: Types of Pathogens
grade: 11
subject: Science
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character: Mr. Lee
topic: Vaccination and Disease Prevention
grade: 11
subject: Science
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