Communicable DiseasesCommunicable Disease ControlDisease NotificationQuarantinePopulation SurveillanceCommunicable Diseases, EmergingDisease OutbreaksPublic Health AdministrationDuty to WarnPublic HealthOperations ResearchCommittee MembershipMediterranean RegionPatient IsolationEpidemiologyWorld Health OrganizationCenters for Disease Control and Prevention (U.S.)Developing CountriesPublic Health PracticeDisease Transmission, InfectiousDecontaminationInternational CooperationHealth PrioritiesWalesNight CareWorld HealthOrganizational PolicyHygieneHistory, 21st CenturyTravelHistory, 20th CenturyAfricaInfection ControlSentinel SurveillanceSingaporeIncidenceMeaslesSeasonsEmigration and ImmigrationEnglandUnited States Food and Drug AdministrationEpidemiologic MethodsTuberculosisHealth PolicyUnited StatesEducation, Medical, ContinuingRisk FactorsCause of DeathGreat BritainHealth PersonnelEuropeDiarrheaResearchInfluenza, HumanDelivery of Health CarePrevalenceAge DistributionQuestionnairesData CollectionUrban PopulationHIV InfectionsInfant, NewbornChronic DiseaseSocioeconomic FactorsInterviews as TopicSex DistributionRegistriesRetrospective StudiesHealth Knowledge, Attitudes, PracticeCross-Sectional StudiesTime Factors