XK and infection: Influenza-specific IFNγ responses in peripheral circulating blood showed a trend for ferrets infected with the high dose to have higher responses at day 7 post-infection for HA (Figure 4a), NA (Figure 4b), NP (Figure 4c) and homologous whole virus (Figure 4d) compared to those infected with the low dose, but these were only found to be significant against whole virus (p 0.0052).