character: Mr. David Yang
topic: Understanding Pathogens and the Body's Defense Mechanisms
grade: 9
subject: Science
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character: Dr. Emily Carter
topic: The Immune Response: How the Body Fights Disease
grade: 9
subject: Science
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character: Ms. Anna Brooks
topic: Types of Pathogens and Their Impact on Human Health
grade: 9
subject: Science
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character: Mr. John Smith
topic: Vaccines: How They Help the Immune System
grade: 9
subject: Science
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