Respiratory Tract InfectionsRespiratory SystemNasal MucosaNasopharynxCommon ColdOtitis MediaRespiratory Tract DiseasesPharyngitisNoseTonsillitisNasal CavityParamyxoviridae InfectionsAnti-Bacterial AgentsFerretsTurbinatesMetapneumovirusRespiratory Syncytial VirusesPharynxHaemophilus influenzaeVirus DiseasesRespiratory Syncytial Virus InfectionsSinusitisStreptococcus pneumoniaeNose DiseasesAerosolsAdministration, IntranasalMoraxella (Branhamella) catarrhalisTracheaOrthomyxoviridae InfectionsRespiratory Tract NeoplasmsLarynxNeisseriaceae InfectionsLungAcute DiseaseRhinovirusPicornaviridae InfectionsHaemophilus InfectionsHuman bocavirusBordetella bronchisepticaBodily SecretionsNasal Lavage FluidBronchitisCoughBacterial InfectionsLaryngismusInfluenza A virusInfluenza, HumanUrinary Tract InfectionsPneumonia, ViralVirus SheddingParainfluenza Virus 3, HumanUpper ExtremitySeasonsRespirovirus InfectionsBordetella InfectionsRespiratory MucosaDrug UtilizationAdenoidsOrthomyxoviridaeLaryngeal DiseasesPneumoniaEustachian TubeAdministration, InhalationInfant, NewbornTracheal NeoplasmsGuaifenesinPneumococcal InfectionsStreptococcus pyogenesAntitussive AgentsImmunoglobulin AStreptococcal InfectionsActinobacillus suisSkin ManifestationsMucusRespiratory Syncytial Virus, HumanMoraxellaceae InfectionsProspective StudiesRhinitisAdenoidectomyGastrointestinal TractPasteurella multocidaHexylresorcinolKveim TestPhysician's Practice PatternsUrinary TractPenicillin VMucous MembraneWegener GranulomatosisMycoplasma InfectionsInfluenza A Virus, H5N1 SubtypeCoronavirus OC43, HumanNeisseria lactamicaVirusesIrritantsMycoplasmaImmunity, MucosalAntibodies, ViralCarrier StateSputumBronchi