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Start Over Subjects Brazil ✖Remove constraint Subjects: Brazil Subjects Yellow Fever ✖Remove constraint Subjects: Yellow Fever Titles Fred L. Soper and Alexander Burke crossing a bridge to inspect the site of a yellow fever infection near Coronel Ponce, Mato Grosso, Brazil ✖Remove constraint Titles: Fred L. Soper and Alexander Burke crossing a bridge to inspect the site of a yellow fever infection near Coronel Ponce, Mato Grosso, Brazil

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