Influenza A Strain-Dependent Pathogenesis in Fatal H1N1 and H5N1 Subtype Infections of Mice
Figure 2. Effect of influenza A virus subtype H5N1 and H1N1 strains on lung weight after intranasal inoculation of 10× the 50% mouse lethal dose on day 0. Absolute values are given as means ± SD for 5 mice at each time point. For each virus strain, means significantly different from those of control (CTL) lungs are indicated (nonparametric Mann-Whitney test). *p<0.05; †p<0.01.