KLRC1 and infection: Furthermore, there was an inverse relationship between the proportions of NKG2A+NKG2C−NK cells and NKG2A−NKG2C+NK cells in the twelfth month of infection (r = −0.58, P = 0.009; Table 1) and in chronic infection over 2 years (r = −0.68, P = 0.003; Table 1).