TLR9 and cytomegalovirus infection: Regarding the high-level CMV infection, the TLR9 (rs352139) SNP was found to act as an independent risk factor (aHR: 1.859; 95% CI: 1.039–3.328; P-value = 0.037) and the TLR3 (rs3775291) SNP to play a protective role (aHR: 0.409; 95% CI: 0.162–1.036; P-value = 0.059) (Table S5).