United StatesPrevalenceHealth SurveysRisk FactorsDisabled PersonsIncidenceTime FactorsHomeless PersonsAge FactorsMolecular Sequence DataHIV InfectionsPopulation SurveillanceQuestionnairesVisually Impaired PersonsMentally Ill PersonsPhylogenyAge DistributionCross-Sectional StudiesCohort StudiesCost of IllnessMentally Disabled PersonsFossilsInfant, NewbornBiological EvolutionHealth Care CostsBase SequenceEvolution, MolecularDisease OutbreaksProspective StudiesSex DistributionRetrospective StudiesSequence Analysis, DNAAmino Acid SequenceSocioeconomic FactorsSex FactorsCosts and Cost AnalysisFollow-Up StudiesHospitalizationWorld HealthData CollectionLongitudinal StudiesRisk AssessmentPregnancyTreatment OutcomeCaliforniaIndiaHealth Services AccessibilityWounds and InjuriesReproducibility of ResultsChronic DiseaseDeveloping CountriesRegistriesHealth ExpendituresHealth StatusAgingLogistic ModelsDemographyMass ScreeningGreat BritainRural PopulationRiskAcquired Immunodeficiency SyndromeSmokingMortalityDatabases, FactualVaccinationRegression AnalysisMutationUrban PopulationSpecies SpecificityCost SavingsSeasonsHealth Knowledge, Attitudes, PracticePublic HealthComorbidityEthnic GroupsCanadaAfricaNeoplasmsGeographySwedenResidence CharacteristicsTravelCause of DeathEuropeChinaSeverity of Illness IndexSensitivity and SpecificityCost-Benefit AnalysisDementiaSingle PersonTuberculosisAustraliaGenotypeForecastingDiabetes MellitusCenters for Disease Control and Prevention (U.S.)TimeInfluenza, HumanSequence Alignment