Fig 2.

The coinfection index negatively correlates with virus input. (A) HeLa cells were incubated with increasing amounts of DsRed and/or GFP reporter viruses. Shown are the percentages of reporter-positive cells measured and calculated as described in the legend to Fig. 1B. (B) The coinfection index, calculated as the ratio between the experimental and calculated percentages of coinfection events, was plotted as a function of virus input. Representative results of an experiment performed three times in duplicate are shown. The error bars indicate standard deviations.