Significantly higher levels of M2e specific IgG (Fig. 4c,e) and IgA (Fig. 4d,f) antibodies were induced in BALF (Fig. 4c,d) and lung extracts (Fig. 4e,f) from the rgH3N2 4xM2e group compared to the rgH3N2 group at 5 days after infection with A/Phil. This evidence concerns the gene CD79A and infection.