Respiratory Tract InfectionsVirus DiseasesAcute DiseaseParamyxoviridae InfectionsHerpesvirus 1, BovineNasopharynxRespiratory Syncytial Virus InfectionsSerum Albumin, BovineMetapneumovirusRhinovirusVirusesSeasonsInfant, NewbornCommon ColdPicornaviridae InfectionsRespiratory Syncytial VirusesPneumonia, MycoplasmaMycoplasma pneumoniaeRespiratory Syncytial Virus, HumanAnti-Bacterial AgentsLeukemia Virus, BovineInfluenza, HumanNasal Lavage FluidAdenoviridae InfectionsBronchitisLungHuman bocavirusRespirovirusPneumoniaAdenovirus Infections, HumanRespiratory Tract DiseasesDiarrhea Viruses, Bovine ViralPneumonia, ViralCattle DiseasesMastitis, BovineInfectious Bovine RhinotracheitisWhooping CoughChlamydophila pneumoniaeRespirovirus InfectionsBovine papillomavirus 1Pneumonia, BacterialBronchiolitisPharynxBronchiolitis, ViralNasopharyngitisAir Pollution, IndoorBordetella pertussisMolecular Sequence DataBronchopneumoniaRespiratory SoundsDiarrheaBordetella bronchisepticaTracheitisChild, HospitalizedDiarrhea, InfantilePasteurellosis, PneumonicEnterovirus D, HumanMycoplasma InfectionsMycoplasma pulmonisBacterial InfectionsNoseTuberculosis, BovineChild Day Care CentersBordetella InfectionsSentinel SurveillanceBovine Virus Diarrhea-Mucosal DiseaseAsthmaPseudomonas InfectionsOtitis MediaCoronaviridae InfectionsHospitalizationPolymerase Chain ReactionHaemophilus influenzaeEnzootic Bovine LeukosisChlamydophila InfectionsRespiratory SystemKeroseneMauritaniaPhysicians' OfficesEchinaceaOrthomyxoviridaeCoughBangladeshPharyngitisProspective StudiesIncidenceInappropriate PrescribingStreptococcus pneumoniaeAmino Acid SequenceBronchiectasisPseudomonas aeruginosaRespiratory Syncytial Virus, BovineEnergy-Generating ResourcesCoronavirus, BovineAntibodies, BacterialRisk FactorsPrevalenceCoronavirus NL63, HumanCoronavirus OC43, HumanBerlin