Figure 3.

Virus titres in mouse lung. Titres were determined by plaque assay of individual lung homogenates in MDCK cells, n = 8 per group. Prior smoke exposure was linked to higher virus titres. Data are mean +/- SEM, ***p < 0.001, Student's two-tailed t-test. Results shown are for the d3 time point, at d10 virus was undetectable in both smoke and influenza and influenza alone mice.