Inhalation ExposureRespiratory Tract InfectionsAdministration, InhalationRespiratory SystemBurns, InhalationSmoke Inhalation InjuryInhalationAerosolsRespiratory Tract DiseasesLungRespiratory Tract NeoplasmsUrinary Tract InfectionsTracheaAnti-Bacterial AgentsParamyxoviridae InfectionsNasal MucosaRespiratory Syncytial Virus InfectionsNasopharynxRespiratory Syncytial VirusesMetapneumovirusBronchiGastrointestinal TractBronchoalveolar Lavage FluidMoraxella (Branhamella) catarrhalisUrinary TractPneumoniaAsthmaAnesthetics, InhalationNasal CavityBronchitisHaemophilus influenzaeNoseAnesthesia, InhalationPowdersAtmosphere Exposure ChambersVirus DiseasesHuman bocavirusAdministration, IntranasalCoughBronchial Provocation TestsSputum