1. Ethiopian Health and Nutrition Research Institute (EHNRI), Addis Ababa, Ethiopia.
2. Department of Microbiology, Immunology and Parasitology, Faculty of Medicine, Addis Ababa University, Addis Ababa, Ethiopia.
3. Laboratory of Experimental Virology (LEV), Department of Medical Microbiology–Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center of the University of Amsterdam, Amsterdam, The Netherlands.
4. Regional Microbiological and Serological Laboratory, Hospital Hilversum, Hilversum, The Netherlands.
5. Crucell Holland B.V., Leiden, The Netherlands.
6. Rijksinstituut voor Volksgezondheid en Milieu (RIVM), 3721 MA Bilthoven, The Netherlands.
7. Primagen, Amsterdam, The Netherlands.