MeaslesMeasles virusMeasles VaccineMeasles-Mumps-Rubella VaccineSubacute Sclerosing PanencephalitisMorbillivirusAntigens, CD46Immunization ProgramsMumpsDisease OutbreaksVaccinationAntibodies, ViralRubellaMumps VaccineHemagglutinins, ViralImmunization ScheduleRubella VaccineMass VaccinationMumps virusRubella virusPopulation SurveillanceVero CellsDisease NotificationGuinea-BissauViral Fusion ProteinsPan American Health OrganizationAmericasNigerTravelDistemper Virus, CanineCercopithecus aethiopsVaccines, CombinedDisease EradicationNucleoproteinsWorld HealthImmunoglobulin MRubella Syndrome, Congenital