Fig. 3.

Depiction of the titer of the clinical EV71 virus using two methods based on log₂ dilution. The dead cell percentages are plotted against virus dilutions on a log₂ scale. The dilution factor 2⁰ represents undiluted virus control, which was assumed to display 100 % cell death but was quantifiably calculated using MTT in the other method. The values are means of three independent experiments from which standard deviations were calculated