876314.fig.004a
(a)
876314.fig.004b
(b)
876314.fig.004c
(c)
876314.fig.004d
(d)
876314.fig.004e
(e)
Figure 4: (a) Survival of young and aged mice following A/PR8 challenge. (b) Weight loss following A/PR8 challenge. (c) Lung viral titers in lungs at day 5 after A/PR8 challenge. (d) Lung histology. (e) Lung infiltrates.