1. Center for Emerging Zoonotic and Parasitic Diseases, National Institute for Communicable Disease of the National Health Laboratory Service, Sandringham, South Africa
2. Division of Virology, University of the Free State, Bloemfontein, South Africa
3. Centre for Viral Zoonoses, Department of Medical Virology, University of Pretoria, Pretoria, South Africa
4. Division of Virology, National Health Laboratory Service, Universitas, Bloemfontein, South Africa
5. Department of Microbiology and Infectious Diseases, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa