Respiratory Tract InfectionsUrinary Tract InfectionsClinical Trials as TopicAnti-Bacterial AgentsRespiratory SystemParamyxoviridae InfectionsMetapneumovirusRespiratory Syncytial Virus InfectionsNasopharynxHuman bocavirusRespiratory Syncytial VirusesAcute DiseaseMoraxella (Branhamella) catarrhalisCommon ColdVirus DiseasesBronchitisCommunity-Acquired InfectionsBacterial InfectionsRespiratory Tract DiseasesHaemophilus influenzaePneumoniaBronchiolitisProspective StudiesStreptococcus pneumoniaeDrug UtilizationOtitis MediaPicornaviridae InfectionsTreatment OutcomeInfant, NewbornPharyngitisPneumonia, ViralRhinovirusTonsillitisPhysician's Practice PatternsPneumonia, BacterialRespiratory Syncytial Virus, HumanReproductive Tract InfectionsCoughHaemophilus InfectionsAnti-Infective AgentsDouble-Blind MethodAmoxicillin-Potassium Clavulanate CombinationBocavirusNeisseriaceae InfectionsSeasonsParvovirinaeAnti-Infective Agents, UrinaryParvoviridae InfectionsSinusitisLungUrinary TractDiagnostic Test ApprovalMycoplasma pneumoniaeMacrolidesMicrobial Sensitivity TestsTime FactorsVirusesDrug PrescriptionsClinical Trials, Phase III as TopicRespiratory SoundsRespiratory Tract NeoplasmsBacteriuriaSputumVesico-Ureteral RefluxBronchopneumoniaNasal MucosaHospitalizationUrinary CatheterizationPneumococcal InfectionsMoraxellaceae InfectionsDrug Resistance, BacterialPneumonia, MycoplasmaAzithromycinEscherichia coli InfectionsFluoroquinolonesClinical Trials, Phase II as TopicBronchiolitis, ViralBodily SecretionsRisk FactorsResearch DesignRandomized Controlled Trials as TopicPyelonephritisRetrospective StudiesRecurrenceChlamydophila pneumoniaeTracheaBordetella InfectionsUrineFollow-Up StudiesDrug Resistance, MicrobialFamily PracticeRespirovirus InfectionsIncidenceClinical Trials, Phase I as TopicNoseFeverKetolidesIgG DeficiencyPneumonia, PneumococcalSeverity of Illness Index