Table 1. Patient information.

Summary of the patients with previous CCHFV infection from whom peripheral blood mononuclear cells were extracted for interferon gamma ELISpot assays.

Study number	Gender	Age (years)	Province	Likely route of exposure	Time since infection
01	Male	53	Free State	Tick bite	13 years
02	Male	75	Free State	Tick bite	13 years
03	Male	45	Free State	Tick bite	12 years
06	Male	59	Free State	Tick bite	5 years
07	Male	69	Free State	Tick bite	5 years
08	Male	42	North West	Veterinarian	5 years
09	Male	50	Free State	Tick bite	5 years
11	Male	56	Free State	Tick bite (veterinarian)	4 years
12	Male	70	Free State	Livestock and tick exposure	3 years
13	Male	67	Free State	Tick bite	3 years
15	Male	36	Free State	Livestock and tick exposure	10 months