Similarly, a previous study by Wu et al. reported that the exogenous addition of either serum-purified or recombinant MBL can inhibit HCMV infection in human embryonic pulmonary fibroblasts in vitro, and the inhibition could be reduced proportionally with increasing concentrations of mannan, a major ligand recognized by MBL [57]. Here, MBL2 is linked to cytomegalovirus infection.