Karin Leder1,2, Olivier Bouchaud3, Lin H Chen4,5. 1. Victorian Infectious Diseases Service, Royal Melbourne Hospital at the Doherty Institute for Infection and Immunity, Parkville, Australia. 2. Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Australia. 3. Hôpital Avicenne - Service des Maladies Infectieuses et Tropicales-Université Paris 13-Sorbonne Paris Cité, Bobigny, France. 4. Division of Infectious Diseases, Mount Auburn Hospital, Cambridge, MA, USA. 5. Harvard Medical School, Boston, MA, USA.