character: Mr. Jason Miller
topic: Antibodies and Their Functions
grade: 9
subject: Science
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character: Dr. Sarah Johnson
topic: Immune System Overview
grade: 9
subject: Science
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character: Ms. Emily Chen
topic: Types of Immunoglobulins
grade: 9
subject: Science
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character: Mr. David Brown
topic: How Vaccines Work
grade: 9
subject: Science
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