Asymptomatic InfectionsLeishmania infantumLeishmaniasis, VisceralAntibodies, ProtozoanCarrier StateAntigens, ProtozoanAsymptomatic DiseasesMalaria, FalciparumParasitemiaPlasmodium falciparumEndemic DiseasesRotavirus InfectionsBrazilDisease OutbreaksProtozoan ProteinsSeroepidemiologic StudiesLeishmaniaFecesSerologic TestsGonorrheaMalaria, VivaxAntibodies, ViralEnzyme-Linked Immunosorbent AssayRotavirusMicroscopyDNA, ProtozoanPlasmodiumChlamydia InfectionsMalariaDiarrheaPlasmodium vivaxPolymerase Chain ReactionPrevalenceInfluenza, HumanInfant, NewbornAntibodies, BacterialChlamydia trachomatisIndiaAntimalarialsRNA, ViralImmunoglobulin GSeasonsViral LoadGenotypeDNA, ViralSequence Analysis, DNAMolecular Sequence DataCohort StudiesCross-Sectional StudiesPhylogenyIncidenceAge FactorsProspective StudiesSensitivity and SpecificityBase SequenceRisk FactorsTime Factors