AR and infection: After 24 h of infection in Vero cells at a multiplicity of infection (MOI) of 0.1 PFU/cell (based on the titer in the presence of 100 μM E151), VP1 antigen (Fig. 2D), RNA copies (Fig. 2E), and progeny titers (Fig. 2F) of RG/B5-AR rose incrementally with the increased E151 concentrations and reached the highest level at 20 μM.