1. World Health Organization (WHO) Collaborating Center for Arbovirus and Viral Hemorrhagic Fever Reference and Research, Nairobi, Kenya;
2. WHO South Sudan, Warwick Center, Nairobi, Kenya;
3. Centers for Disease Control and Prevention, Atlanta, Georgia, USA;
4. Kenya Medical Research Institute, Nairobi, Kenya;
5. National Institute for Communicable Diseases, Johannesburg, Republic of South Africa;
6. U.S. Army Medical Research Unit-Kenya, Nairobi, Kenya