CD209 and viral infectious disease: Infection levels were observed by intracellular immunofluorescence assays (Figure 1A) and by replication curves in infected Vero cells (Figures 2A, B), human dermal fibroblasts (Figure 2B), and U937-DC-SIGN (Figure 2C), which showed differences in permissiveness among cell types; as expected, the highest peak titers were reached in Vero cells, a highly used cell line in virology because of its highest susceptibility and permissiveness to multiple viral infections, probably associated with the deletion of the type I interferon cluster on chromosome 12 (Naoki et al., 2014).