Authors:Eduardo Suarez-Castaneda, Ministry of Health, El SalvadorEleanor Burnett, Emory UniversityMiguel Elas, Ministry of Health, El SalvadorRafael Baltrons, Pan American Health OrganizationLorenzo Pezzoli, Consultant for the Pan American Health OrganizationBrendan Flannery, Centers for Disease Control and PreventionDavid Kleinbaum, Emory UniversityLucia Helena de Oliveira, Pan American Health OrganizationM. Carolina Danovaro-Holliday, Pan American Health Organization