Peking University - Center for Statistical Sciences, Peking University - Beijing International Center for Mathematical Research, Peking University - Department of Biostatistics, Yichang Municipal Center for Disease Control and Prevention, Monash University - Department of Econometrics and Business Statistics, Chinese Center for Disease Control and Prevention (China CDC) - National Center for Chronic and Noncommunicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention (China CDC) - National Center for Chronic and Noncommunicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention (China CDC) - National Center for Chronic and Noncommunicable Disease Control and Prevention, Yichang Municipal Center for Disease Control and Prevention and Peking University - Center for Statistical Sciences

affiliation not provided to SSRN, affiliation not provided to SSRN, Monash University - Department of Econometrics and Business Statistics, affiliation not provided to SSRN, University of New South Wales (UNSW), University of Melbourne - Peter Doherty Institute for Infection and Immunity, University of Melbourne, University of Melbourne and affiliation not provided to SSRN

Safer Care Victoria - Department of Health and Human Services, Klinikum der Universität München, Monash University - Department of Infectious Diseases, Monash University - Department of Infectious Diseases, University of Melbourne - Peter Doherty Institute for Infection and Immunity, Monash University - Department of Infectious Diseases, Victorian Department of Health and Human Services, Department of Health and Human Services, Victoria, Department of Health and Human Services, Victoria, University of Melbourne - School of Computing and Information Systems and Monash University - Department of Econometrics and Business Statistics