1 Translational Research Unit, Department of Epidemiology and Preclinical Research National Institute for Infectious Diseases L. Spallanzani-IRCCS, Roma, Italy. Electronic address: delia.goletti@inmi.it.
2 Infectious Diseases Translational Research Programme, Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore; Division of Infectious Diseases, Department of Medicine, National University Hospital, Singapore, Singapore; Institute for Health Innovation and Technology (iHealthtech), National University of Singapore, Singapore, Singapore.
3 Institute for Infection and Immunity, St George's, University of London, London, United Kingdom.