character: Professor Mark White
topic: Public Health Policies and Vaccination Rates
grade: 9
subject: Biology
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character: Dr. Emily Carter
topic: Impact of Vaccination on Population Health
grade: 9
subject: Biology
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character: Dr. John Smith
topic: Historical Vaccination Trends and Policies
grade: 9
subject: Biology
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character: Dr. Lisa Johnson
topic: Understanding Vaccine Hesitancy
grade: 9
subject: Biology
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