0864-3466 0864-3466 S0864-34662020000500002 Cuba 00 00 2020 00 00 2020 46 1 2017 17 1 1 237-48 2 2020 .0 4. 3 1983 308 17 17 1000-5 4 WHO 2020 5 WHO 2020 6 Center for Disease Control and Prevention. U.S. Departament of Health & Human Service: USA.gov 2020 7 European Centre for Disease Prevention and Control 2020 8 2020 9 2019 48 3 3 680-3