Figure 2: Growth kinetics of the rN11A virus. HMV-II cells were infected with rWT or rN11A at an MOI of 0.001 and then incubated at 33°C for 120 hrs. The culture media were used for the determination of infectious titers using LLC-MK2 cells. A representative result from three independent experiments is shown. Data are expressed as the mean ± standard deviation. All comparisons between groups were statistically evaluated by using unpaired Student's t test (*, p < 0.05; **, p < 0.01).