character: Dr. Thomas Rivera
topic: Impact of Vaccination on Public Health
grade: 9
subject: Biology
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character: Dr. Emily Carter
topic: Herd Immunity and Its Importance
grade: 9
subject: Biology
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character: Dr. Alan Kim
topic: History of Vaccinations and Disease Control
grade: 9
subject: Biology
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character: Nurse Linda Martinez
topic: Public Health Strategies and Vaccination Campaigns
grade: 9
subject: Biology
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