1. School of Biological Sciences, College of Biological and Physical Sciences, University of Nairobi, Nairobi, Kenya;
2. Centre for Biotechnology Research and Development, Kenya Medical Research Institute, Nairobi, Kenya;
3. Department of Biology, Center for Evolutionary and Theoretical Immunology, Museum of Southwestern Biology, Parasitology Division, University of New Mexico, Albuquerque, New Mexico;
4. Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon;
5. Influenza Surveillance Program, Centers for Disease Control and Prevention, Nairobi, Kenya;
6. Department of Basic Medical Sciences, Western University of Health Sciences, Lebanon, Oregon