1. Bernhard Nocht Institute for Tropical Medicine, WHO Collaborating Centre for Arbovirus and Haemorrhagic Fever Reference and Research, Hamburg, Germany
2. EUROIMMUN Medizinische Labordiagnostika AG, Lübeck, Germany
3. German Red Cross Blood Service Baden-Württemberg-Hesse, Frankfurt, Germany
4. Microbiology Unit, Regional Reference Centre for Microbiological Emergencies, Bologna, Italy
5. The authors contributed equally to this study