FIG 1.

Effects of food dyes on infection of RD cells by EV71-GFP. EV71-GFP viruses were incubated with different dyes at 300 μM in cell culture medium at 37°C for 1 h and then inoculated into RD cells in 96-well plates at a multiplicity of infection (MOI) of 1. The GFP signals were observed and recorded at 24 h postinfection.