1 1Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology and Immunology, The University of Melbourne at The Doherty Institute for Infection and Immunity, Melbourne, Vic 2Centre for Infectious Disease and Microbiological Laboratory Services, Institute for Clinical Pathology and Medical Research, Westmead Hospital, Sydney, NSW 3Marie Bashir Institute for Infectious Diseases and Biosecurity, University of Sydney, Sydney, NSW 4Victorian Department of Health, Communicable Disease Epidemiology and Surveillance, Health Protection Branch, Melbourne, Vic 5National Centre for Epidemiology and Population Health, Australian National University, Canberra, ACT 6Infectious Diseases Department, Austin Health, Heidelberg, Vic, Australia.