Figure 1.

Percentage of macroscopic lesion from MDA/C, MDA/V/C, and V/C pigs from trial 1 (A) and C, WIV/C, and LAIV/C pigs in trial 2 (B) at 5 days post‐infection. Average microscopic lesion scores ± SEM of each treatment group are indicated in table. Means with different letters within a column are statistically different (P ≤ 0·05). Non‐challenged pigs had no macroscopic and microscopic lesion scores and are not included. C, challenged; MDA, maternal derived antibody; V, vaccinated; WIV, whole virus inactivated vaccine; and LAIV, live attenuated influenza vaccine.