MeaslesMeasles virusMeasles VaccineMeasles-Mumps-Rubella VaccineGermanySubacute Sclerosing PanencephalitisMorbillivirusAntigens, CD46Immunization ProgramsDisease OutbreaksMumpsVaccinationAntibodies, ViralRubellaMumps VaccineHemagglutinins, ViralImmunization ScheduleRubella VaccineMass VaccinationPopulation SurveillanceMumps virusRubella virusVero CellsDisease NotificationGuinea-BissauViral Fusion ProteinsPan American Health OrganizationTravelAmericasNigerDistemper Virus, CanineCercopithecus aethiopsVaccines, CombinedDisease EradicationGermany, WestNucleoproteinsWorld HealthImmunoglobulin MIncidenceImmunoglobulin GRubella Syndrome, CongenitalSeroepidemiologic Studies