character: Ms. Sarah Johnson
topic: Mechanisms of Antibody Production
grade: 9
subject: Science
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character: Dr. Emily Carter
topic: Types of Immunity
grade: 9
subject: Science
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character: Mr. John Smith
topic: Immune System Components
grade: 9
subject: Science
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character: Mrs. Rachel Lee
topic: Vaccination and Immune Response
grade: 9
subject: Science
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