2444-7986 2444-7986 S2444-79862020000400001 14201/orl.23079 España 00 12 2020 00 12 2020 11 4 389 394

1 2020 16 699-701 2 2020 323 18 18 1843-4 3 2011 4 122 4 1997 48 6259 5 2020 6 2020 7 8 Centers for Disease Control and Prevention 2020 9 World Health Organization 2020