Respiratory Tract InfectionsOtitis MediaCommon ColdUrinary Tract InfectionsTonsillitisPharyngitisAnti-Bacterial AgentsNasopharynxParamyxoviridae InfectionsMetapneumovirusRespiratory SystemSinusitisAcute DiseaseLaryngismusVirus DiseasesHuman bocavirusRespiratory Syncytial Virus InfectionsRespiratory Syncytial VirusesDrug UtilizationRhinovirusPicornaviridae InfectionsCoughAntitussive AgentsGuaifenesinNasal MucosaHexylresorcinolPhysician's Practice PatternsAdenoidectomyBacterial InfectionsAdenoidsBronchitisStreptococcus pneumoniaeHaemophilus influenzaeLethargyDrug PrescriptionsProspective StudiesInfant, NewbornSeasonsPneumoniaFeverMoraxella (Branhamella) catarrhalisSelf MedicationWatchful WaitingStreptococcal InfectionsExpectorantsRespiratory Tract DiseasesFamily PracticeStreptococcus pyogenesRespiratory SoundsInfluenza, HumanDouble-Blind MethodRhinitisNoseAsthmaNeisseriaceae InfectionsCommunity-Acquired InfectionsHaemophilus InfectionsPneumonia, ViralIncidenceNasal CavityRecurrence