Hong KongAir PollutionAir PollutantsParticulate MatterNitrogen DioxideSulfur DioxideAir Pollution, IndoorVehicle EmissionsOzoneEnvironmental ExposureEnvironmental MonitoringAirRespiratory Tract DiseasesWater PollutionEpidemiological MonitoringParticle SizeEnvironmental PollutionCitiesUrban HealthOxidants, PhotochemicalInhalation ExposureCarbon MonoxideSeasonsWeatherNitrogen OxidesRespiration DisordersMotor VehiclesChinaSmokeMortalitySmogAir MovementsEnvironmental HealthSootMeteorological ConceptsCookingEnvironmental IllnessHeatingFossil FuelsAsthmaCoalUrban PopulationTobacco Smoke PollutionPoisson DistributionMaternal ExposureCzech RepublicRisk FactorsEpidemiologic StudiesAcid RainEnergy-Generating ResourcesRegression AnalysisPolycyclic Hydrocarbons, AromaticWater Pollution, ChemicalIndustryInfluenza, HumanAir MicrobiologyWoodCohort StudiesInfant, NewbornTime FactorsInfluenza A virusVentilationHumidityInfluenza A Virus, H9N2 SubtypePrevalenceIncinerationPublic HealthRisk AssessmentCross-Sectional StudiesModels, TheoreticalSevere Acute Respiratory SyndromeInfluenza A Virus, H5N1 SubtypeEmbolism, AirCaliforniaDustAir Pollutants, OccupationalHemagglutination Inhibition TestsGeographic Information SystemsMaximum Allowable ConcentrationMetals, HeavyOrthomyxoviridaeResidence CharacteristicsCardiovascular DiseasesQuestionnairesRetrospective StudiesHospitalizationBostonCarbonLung DiseasesFiresNoise, TransportationModels, StatisticalIncidencePeak Expiratory Flow RateGeographyClimateDisease OutbreaksPolycyclic CompoundsCross-Over StudiesRespiratory Sounds