Figure 2
From: Pulmonary immune responses to 2009 pandemic influenza A (H1N1) virus in mice
The kinetics of pulmonary immune cells responses induced by influenza virus infection. Mice without infection were used as the control group. Mean cell numbers were representative of 3 mice lungs per time point group, and I bars indicated the standard deviations. The dotted lines were the control level. $ p < 0.05, compared among different time-points within BJ501 viruses infection, # compared among different time-points within PR8 viruses infection, *p < 0.05 and **p < 0.01, compared between BJ501 and PR8 infections at the same time-point.