1. These authors contributed equally
2. Department of Health Protection and Epidemiology, Baden-Wuerttemberg State Health Office, Stuttgart, Germany
3. Project Containment Scouts, Federal Office of Administration, Cologne, Germany
4. Postgraduate Training for Applied Epidemiology (PAE), Robert Koch-Institute Berlin, Germany
5. European Programme of Intervention Epidemiology Training (EPIET), Stockholm, Sweden
6. Department of Hygiene and Infection Control, Baden-Wuerttemberg State Health Office, Stuttgart, Germany
7. Institute for Clinical Epidemiology and Applied Biometry, University of Tübingen, Germany