TLR9 and cytomegalovirus infection: Paradowska et al. documented that heterozygous variant of TLR9-1486T<C (rs187084) was associated with statistically higher HCMV DNA concentration in blood in HCMV-infected infants.18 Studzińska et al. reported higher viremia and viruria and increased risk of symptomatic HCMV infection in infants with heterozygous genotype of TLR3 rs3775291.