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Matches in Harvard for { ?s ?p Contemporary areas of occurrence of dengue and yellow fever -- Distribution of dengue and yellow-fever vectors -- Distribution of yellow-fever cases, 1930-1951 : [Central and South America] -- Distribution of yellow-fever cases, 1930-1951 : [Africa] -- Distribution of yellow-fever immunity : [Central and South America] -- Distribution of yellow-fever immunity : [Africa] -- Yellow fever recorded occurrence 1600-1930.. }

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