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Yellow FeverPublic HealthTyphoid FeverAnimal DiseasesInfectious DiseasesHygieneSchool HygieneWater AnalysisAnimal FoodPollution of WaterAmerican Public HealthInfant MortalityFever Epidemicin WaterPrevention of TuberculosisSanitary ScienceWater SupplyVaccine VirusPublic Health LegislationPulmonary Consumption