character: Pathogen Defense
topic: How White Blood Cells Combat Infections
grade: 9
subject: Science
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character: Immune Response
topic: Role of Macrophages in Fighting Infection
grade: 9
subject: Science
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character: Lymphocytes
topic: Types of White Blood Cells and their Functions
grade: 9
subject: Science
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character: Antibody Production
topic: How B Cells Create Immunity
grade: 9
subject: Science
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