Fig. 3.

Plaque phenotype of parental EV71-6F and EV71-26M and virus chimeras on Vero cells. Tenfold serial dilutions of virus were inoculated at a volume of 100 µl per well into 12-well tissue-culture trays. Infected cells were incubated for 7 days before staining with 0.05 % (w/v) crystal violet solution. See also Table 1.