0864-0300 0864-0300 S0864-03002021000400026 Peru 00 09 2021 00 09 2021 40 3 1 Coronavirus Resource Center 2021 2 World Health Organization 2019 3 2021 22 2 2 93-7 4 2021 9 1 1 42 5 2021 12 1 1 1-15 6 1991