1. International Centre of Insect Physiology and Ecology, Nairobi P.O. Box 30772-00100, Kenya
2. Zoonotic arbo and Respiratory Virus Research Program, Centre for Viral Zoonoses, Department of Medical Virology, Faculty of Health, University of Pretoria, Gezina 0031, South Africa
3. Institute of Virology, Charité Universitätsmedizin Berlin, Corporate Member of Free University Berlin, Humboldt-University Berlin, and Berlin Institute of Health, 10117 Berlin, Germany