0188-9532 0188-9532 S0188-95322021000100101 10.17488/rmib.42.1.2 00 04 2021 00 04 2021 42 1

1 2020 109 2 2020 3 2020 212 10 10 481-9 4 World Health Organization 2020 5 2020 6 2020 7 2020 8 2020 9 2020 17 3 3 2693-707 10 The Center for Systems Science, at Johns Hopkins University 2020 11 The Center for Systems Science, at Johns Hopkins University 2020 12 DXY 2020 13 CCDC 2020 14 Government of the Hong Kong special administrative region T 2020 15 Macau Government 2020 16 Taiwan CDC 2020 17 European Centre for Disease Prevention and Control 2020 18 Pontryagin 1987 19 2000 20 2017 5 3 3 917-30 21 2017 2 3 3 304-22 22 2020 2020 23 2020 24 2020 17 4 4 2842-52 25 Kingdom of Morocco Ministry of National Education HE 2020 26 Kingdom of Morocco Ministry of National Education HE 2020 3 3 27 2020 26 6 6 832-4