Also, as previously described [29], [39], three KIR genes were associated with chronic hepatitis C treatment response: KIR2DL2 was more frequent in the NSVR group (OR = 1.51 95%, CI = 1.13–2.02; p<0.005) while KIR2DL3 was associated with good treatment outcome (OR = 0.48, 95% CI = 0.32–0.72; p<0.001). Here, KIR3DL1 is linked to chronic hepatitis C virus infection.