SCARB2-dependent infection of RD cells by EV71. siRNA-treated RD cells were infected with EV71 strains 962-Yamagata, 786-Yamagata, 1002-Yamagata, 983-Yamagata, 452-Yamagata, and 75-Yamagata. After 24 h, the cells were fixed and stained with monoclonal antibody against VP2.