1 Infection Prevention and Control Technical and Clinical Hub, Department of Integrated Health Services, World Health Organization, Geneva, Switzerland allegranzib@who.int.
2 Infection Prevention and Control Technical and Clinical Hub, Department of Integrated Health Services, World Health Organization, Geneva, Switzerland.
3 Department of Infectious Diseases, Bern University Hospital and University of Bern, Bern, Switzerland.
4 Infection Control Programme, University of Geneva Hospitals and Faculty of Medicine, Geneva, Switzerland.