Fig. 4From: Efficacy of a live attenuated highly pathogenic PRRSV vaccine against a NADC30-like strain challenge: implications for ADE of PRRSVBodyweight gain of piglets after PRRSV challenge. The bodyweight gain of each piglet after PRRSV challenge was calculated. Data are shown as the mean ± S.E.M. Differences between groups were assessed using a Student’s t-test; statistical significance is denoted as follows: *p < 0.05, **p < 0.01, and ***p < 0.001Back to article page