1 Infection Prevention and Control Unit and Hub, Department of Integrated Health Services, World Health Organization, Avenue Appia, 1211 Geneva 27, Switzerland; Faculty of Health Sciences, University of Malta, Triq Dun Karm, Msida, Malta.
2 Infection Prevention and Control Unit and Hub, Department of Integrated Health Services, World Health Organization, Avenue Appia, 1211 Geneva 27, Switzerland.
3 Faculty of Medicine, University of Geneva, Geneva, Switzerland.
4 Infection Prevention and Control Unit and Hub, Department of Integrated Health Services, World Health Organization, Avenue Appia, 1211 Geneva 27, Switzerland. Electronic address: allegranzib@who.int.