character: Louis Pasteur
topic: Understanding Germ Theory
grade: 3
subject: History
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character: Robert Koch
topic: Koch's Postulates and Germ Theory
grade: 3
subject: History
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character: Joseph Lister
topic: Antiseptic Technique Related to Germ Theory
grade: 3
subject: History
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character: Ignaz Semmelweis
topic: Hand Hygiene and Germ Theory
grade: 3
subject: History
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