Respiratory Tract InfectionsAcute DiseaseVirus DiseasesNasopharynxParamyxoviridae InfectionsMetapneumovirusRespiratory Syncytial Virus InfectionsRhinovirusSeasonsVirusesInfant, NewbornCommon ColdPicornaviridae InfectionsPneumonia, MycoplasmaMycoplasma pneumoniaeRespiratory Syncytial VirusesRespiratory Syncytial Virus, HumanInfluenza, HumanNasal Lavage FluidBronchitisAnti-Bacterial AgentsHuman bocavirusAdenoviridae InfectionsPneumoniaAdenovirus Infections, HumanLungPneumonia, ViralRespiratory Tract DiseasesRespirovirusWhooping CoughChlamydophila pneumoniaePneumonia, BacterialBronchiolitisBronchiolitis, ViralNasopharyngitisPharynxAir Pollution, IndoorRespirovirus InfectionsRespiratory SoundsBordetella pertussisBordetella bronchisepticaChild, HospitalizedTracheitisDiarrhea, InfantileBronchopneumoniaEnterovirus D, HumanMycoplasma pulmonisChild Day Care CentersBordetella InfectionsDiarrheaAsthmaBacterial InfectionsSentinel SurveillancePseudomonas InfectionsOtitis MediaMycoplasma InfectionsHospitalizationNoseHaemophilus influenzaeCoronaviridae InfectionsChlamydophila InfectionsKeroseneMauritaniaPhysicians' OfficesEchinaceaCoughBangladeshRespiratory SystemOrthomyxoviridaePharyngitisProspective StudiesIncidenceInappropriate PrescribingStreptococcus pneumoniaeBronchiectasisEnergy-Generating ResourcesPseudomonas aeruginosaCoronavirus NL63, HumanRisk FactorsBerlinCookingTonsillitisCoronavirus OC43, HumanChild Nutrition DisordersCommunity-Acquired InfectionsLung DiseasesPrevalenceHeatingPneumococcal InfectionsPasteurellosis, PneumonicMozambiqueInfluenza A Virus, H1N1 SubtypeMasksHypersensitivityDeveloping CountriesHaemophilus InfectionsDrug UtilizationHumidityHygieneAntibodies, Bacterial