character: Jonas Salk
topic: Polio Vaccine Development
grade: 9
subject: Biology
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character: Albert Sabin
topic: Oral Polio Vaccine
grade: 9
subject: Biology
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character: Edward Jenner
topic: Development of Vaccination
grade: 9
subject: Biology
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character: Louis Pasteur
topic: Germ Theory and Vaccines
grade: 9
subject: Biology
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