0036-3634 0036-3634 S0036-36342020000500461 10.21149/11435 Mexico Mexico Peru 00 10 2020 00 10 2020 62 5 461 462 1 World Health Organization 2020 2 2018 93 9 9 1400-12 3 2020 369 m1876 4 2005 12 4 4 296-301