A statistically significant association between active post-transplant EBV infection and TCD grafts was shown by Bordon et al. [37] (p = 0.04) as well as for CD4+ depleted grafts by Torre-Cisneros et al. [91] (OR = 11.5 (95% CI: 5.8–22.8)). This evidence concerns the gene CD4 and Epstein-Barr virus infection.