1. Department of Anaesthesiology and Intensive Care Medicine, University Hospital of Cologne, Faculty of Medicine University of Cologne Cologne Germany
2. Institute of Virology, University Hospital Cologne, Faculty of Medicine University of Cologne Cologne Germany
3. Department I of Internal Medicine, University Hospital Cologne, Faculty of Medicine, University of Cologne, German Center for Infection Research Partner Side Köln‐Bonn University of Cologne Cologne Germany
4. Department of Hospital Hygiene and Infection Control, University Hospital Cologne, Faculty of Medicine University of Cologne Cologne Germany