FIG 1.

Growth kinetics of reassortant and endemic swine H3N2 influenza viruses in cell cultures. (A) MDCK cells were infected with different viruses at an MOI of 0.1. (B) PK-15 cells were infected with different viruses at an MOI of 0.01. (C) A549 cells were infected with different viruses at an MOI of 0.01. The data points of the curves indicate the means of the results of 3 independent experiments, and the error bars indicate standard errors of the mean (SEM). *, P < 0.05; **, P < 0.01; *** P < 0.001.