Although no association of MICA rs2596538 G/A gene promoter polymorphism and CMV infection/disease was observed in the recipients, the donors exhibited a significant difference in the MICA rs2596538 G/A allele distribution: the MICA rs2596538 G allele was significantly less frequent in case of CMV infection/disease (69 vs. 42.5%; p = 0.0013; odds ratio OR = 0.3; 95% CI 0.2–0.7; Table 3). Here, MICA is linked to cytomegalovirus infection.