KLRG1 and infection: versus Ly49H- NK cells revealed an unaltered composition of MCMV-specific versus unspecific NK cells in uninfected as well as infected mice (Figure 2G and I) although infection increased KLRG1 expression irrespective of Treg depletion compared to uninfected mice (Infected ≥ 60% of NK cells versus uninfected ≤40% of NK cells) (Figure 2I).