KLRK1 and cytomegalovirus infection: On the contrary, the patients with a recipient NKG2D rs1049174 C allelic variant in combination with a donor MICA rs2596538 G allelic variant (exhibiting higher MICA expression) were protected from CMV (p = 0.003; OR = 0.16; 95% CI 0.04–0.6), suggesting an additional MICA allele-specific role of the NKG2D receptor expression in CMV infection after KTx.