character: Dr. Sarah Johnson
topic: The Role of Immunity in Public Health
grade: 9
subject: Biology
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character: Dr. Emily Carter
topic: Vaccination and Community Immunity
grade: 9
subject: Biology
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character: Professor Mark Thompson
topic: The Impact of Herd Immunity on Disease Transmission
grade: 9
subject: Biology
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character: Dr. Lisa Wong
topic: Understanding Immune Responses in Population Health
grade: 9
subject: Biology
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