Monash University - School of Public Health and Preventive Medicine, Monash University - School of Public Health and Preventive Medicine, Mathematica, Victorian Government - Department of Health and Human Services, Victorian Government - Department of Health and Human Services, University of Tasmania, University of Melbourne - Peter Doherty Institute for Infection and Immunity, University of Melbourne - Peter Doherty Institute for Infection and Immunity and Monash University - Department of Infectious Diseases