character: Albert Sabin
topic: Development of the Oral Polio Vaccine
grade: 10
subject: Science
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character: Jonas Salk
topic: Invention of the Inactivated Polio Vaccine
grade: 10
subject: Science
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character: Polio Virus
topic: Structure and Epidemiology
grade: 10
subject: Science
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character: CDC (Centers for Disease Control and Prevention)
topic: Polio Vaccination Strategies
grade: 10
subject: Science
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