character: Ms. Johnson
topic: Vaccine Development and Public Health
grade: 9
subject: Biology
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character: Dr. Smith
topic: Immunology and Vaccine Mechanisms
grade: 9
subject: Biology
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character: Mr. Lee
topic: Epidemiology and Disease Prevention
grade: 9
subject: Biology
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character: Ms. Patel
topic: The Role of Public Health Policy in Vaccination
grade: 9
subject: Biology
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