Fig. 4.

Levels of IFN-α, IL-1β, IL-2, IFN-γ, IL-6, and IL-8 in the lungs of pigs with SCID or carrier control pigs challenged (CH) with A/California/04/2009, and nonchallenged controls (NC). Lung lavage was collected on day 7 following challenge, and the amount of each indicated cytokine was measured by multiplex ELISA. Each individual symbol indicates the value for a pig in that respective treatment group, with the mean and SEM also indicated. Bars with different letters indicate statistical differences (p ≤ 0.05).