character: Dr. Clara D. Immunity
topic: Immune Response to Infections
grade: 9
subject: Science
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character: Dr. Helen S. Pathogen
topic: Types of Infectious Agents
grade: 9
subject: Science
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character: Professor Alex T. Vaccine
topic: How Vaccines Work
grade: 9
subject: Science
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character: Ms. Lucy C. Antibody
topic: Role of Antibodies in Immunity
grade: 9
subject: Science
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