Despite the similar anti-viral control, lytic CD8+ T cells still drive escape significantly faster (approx. 0.033 per day vs 0.013 per day, p<0.001; Figure 2) and more frequently (67% v 43%, p<0.05; Table 1) than CD8+ T cells operating via a non-lytic mechanism which impairs viral infection. The gene discussed is CD8A; the disease is viral infectious disease.