South AfricaSuburban PopulationFemininityHeart AuscultationLost to Follow-UpSuburban HealthInfluenzavirus CAfrican Continental Ancestry GroupParisUrban PopulationHIV InfectionsSalmonellaLebanonSalmonella InfectionsCD4 Lymphocyte CountAnti-HIV AgentsAntiretroviral Therapy, Highly ActiveHospitals, VoluntaryHospitals, ProprietaryInfant WelfarePrevalenceViral LoadHealthy People ProgramsCitiesUrban HealthInfant, NewbornCohort StudiesChinaRetrospective StudiesHousingDisease OutbreaksResidence CharacteristicsSocioeconomic FactorsCross-Sectional StudiesHealth Knowledge, Attitudes, PracticeRisk FactorsQuestionnairesSex FactorsIncidence