Joy Ebonwu | Africa Centres for Disease Control and Prevention, African Union, Addis Ababa, Ethiopia | jodimegwu@yahoo.com 
Motshabi Modise | Division of Public Health, Surveillance and Response, National Institute for Communicable Disease a division of the National Health Laboratory Service, Sandringham, Johannesburg, South Africa | mothabim@nicd.ac.za 
Nelly Mabotsa | Free State Department of Health, Bophelo House, Bloemfontein, South Africa | nelly.mabotsa@gmail.com
Akhona Tshangela | Africa Centres for Disease Control and Prevention, African Union, Addis Ababa, Ethiopia | akhonat@africa-union.org
Hetani Mdose | South African Field Epidemiology Training Programme, National Institute for Communicable Disease a division of the National Health Laboratory Service, Sandringham, Johannesburg, South Africa | hetanim@nicd.ac.za
Ramasedi Mokoena | Community Health, Faculty of Health Science, University of Free State, Bloemfontein, South Africa | mokoenars1@ufs.ac.za