PPE 2021 5 3 5 37 10 12 2020.02-2021.12 18 97,355 15,384 25,945 138,684 2020 2 2021 12 65,225 2021.03-2021.12 278 10 16,699 15,153 182 3,288 3,076 23,063 2020 2 COVID-19 COVID-19 Chapter3 12