1 Infection Prevention and Control Technical and Clinical Hub, Department of Integrated Health Services, World Health Organization (WHO), Geneva, Switzerland.
2 Faculty of Health Sciences, University of Malta, Msida, Malta.
3 Infection Control Programme, University of Geneva Hospitals and Faculty of Medicine, Gabrielle-Perret-Gentil 4, 1205, Geneva, Switzerland.
4 Infection Control Programme, University of Geneva Hospitals and Faculty of Medicine, Gabrielle-Perret-Gentil 4, 1205, Geneva, Switzerland. didier.pittet@hcuge.ch.