Influenza A Virus, H5N1 SubtypeVirulencePneumoniaPneumonia, BacterialPneumonia, ViralPneumonia, PneumococcalCryptogenic Organizing PneumoniaPneumonia, PneumocystisPneumonia, StaphylococcalPneumonia, Ventilator-AssociatedPneumonia, AspirationCommunity-Acquired InfectionsPneumonia, MycoplasmaSeverity of Illness IndexPneumonia, LipidLungLung Diseases, InterstitialAnti-Bacterial AgentsStreptococcus pneumoniaeIdiopathic Interstitial PneumoniasInfluenza, HumanHospitalizationInfluenza A Virus, H1N1 SubtypeProspective StudiesMurine pneumonia virusPneumocystis jiroveciiTreatment OutcomeRetrospective StudiesRisk FactorsPneumocystisLegionnaires' DiseaseBronchoalveolar Lavage FluidRadiography, ThoracicInfant, NewbornFatal OutcomeMycoplasma pneumoniaeSevere DengueCross InfectionDisease Models, AnimalDisease OutbreaksDengueDengue VirusTime FactorsIncidenceAcute DiseasePulmonary EosinophiliaTrimethoprim-Sulfamethoxazole CombinationRespiratory Syncytial Virus InfectionsOrthomyxoviridae InfectionsBronchopneumoniaImmunocompromised HostPneumonia, Progressive Interstitial, of SheepRespiratory Tract InfectionsCohort StudiesVentilators, MechanicalBronchoalveolar LavageRespiration, ArtificialPandemicsIntensive Care UnitsPneumococcal InfectionsBacteremiaPolymerase Chain ReactionCase-Control StudiesMalaria, FalciparumPneumonia of Swine, MycoplasmalMice, Inbred C57BLAdrenal Cortex HormonesAge FactorsPseudomonas InfectionsPneumococcal VaccinesPrognosisDisease ProgressionAnti-Infective AgentsPneumocystis cariniiEmpyemaSerotypingCytokinesSensitivity and SpecificityGenotypeBiological MarkersLegionella pneumophilaParamyxoviridae InfectionsMice, Inbred BALB CAntibodies, ViralLung DiseasesPulmonary Disease, Chronic ObstructiveNasopharynxMolecular Sequence DataImmunoglobulin GLegionellaRespiratory Syncytial VirusesChild, HospitalizedFeverPentamidineChlamydial PneumoniaLength of StayBronchoscopyRespiratory Syncytial Virus, HumanEnzyme-Linked Immunosorbent AssaySepsis