BangladeshArsenic PoisoningArsenicWater WellsCholeraRural PopulationWater Pollutants, ChemicalDrinking WaterWater SupplyRegional Health PlanningVibrio cholerae O139Henipavirus InfectionsDiarrheaRural HealthEnglandMedicine, TraditionalVibrio cholerae O1Developing CountriesNipah VirusInfant, NewbornMaternal Health ServicesVibrio choleraePoverty AreasState MedicineDisease OutbreaksPrevalenceSocioeconomic FactorsPovertyHome ChildbirthPopulation SurveillanceUrban PopulationEnvironmental ExposureDysentery, BacillarySanitationPregnancyFloodsOrganizationsSeasonsChild Nutrition Disorders