2709-7927 2709-7927 S2709-79272022000300577 Cuba Cuba 00 09 2022 00 09 2022 16 3 577 579 1 2017 6 3 3 267-70 2 2020 41 3 3 210-22 3 2018 50 6 6 350-8 4 2020 5 World Health Organization 2021 6 2019