TaiwanSouth AfricaMyanmarChinaLicensure, NursingWater WellsRural PopulationRural Health ServicesDysentery, BacillaryQuebecHIV InfectionsUrban PopulationPrevalenceTuberculosisAge DistributionIncidenceRisk FactorsInfant, NewbornMolecular EpidemiologySocioeconomic FactorsCross-Sectional StudiesQualitative ResearchQuestionnairesLogistic ModelsAge FactorsHealth Knowledge, Attitudes, PracticeSexual BehaviorCohort StudiesTime FactorsArecaPregnancy