2521-2281 2521-2281 S2521-22812021000300174 10.52379/mcs.v5i3.221 España 00 12 2021 00 12 2021 5 3 174 175 1 Organización Mundial de la Salud (OMS) 2019 2 John Hopkins Bloomberg School of Public Health 2021 3 2020 2 1 1 38-43 4 2019 3 3 3 71-2 5 2021 26 7 7 2843-57