1 Centre for Tropical Medicine and Global Health, Nuffield Dept. of Medicine, University of Oxford, Oxford, UK. Electronic address: louise.sigfrid@gmail.com.
2 University of Bonn Medical Centre, Institute of Virology, Bonn, Germany.
3 Aristotle University of Thessaloniki, Dept. of Microbiology, Thessaloniki, Greece.
4 Centre for Tropical Medicine and Global Health, Nuffield Dept. of Medicine, University of Oxford, Oxford, UK.
5 Department of Viroscience, WHO Collaborating Center for Arboviruses and Viral Haemorrhagic Fever Reference and Research, Erasmus University Medical Centre, Rotterdam, The Netherlands.