Fig. 5From: Efficacy of a live attenuated highly pathogenic PRRSV vaccine against a NADC30-like strain challenge: implications for ADE of PRRSVViremia of piglets after PRRSV challenge. RNA in sera collected from each piglet in the different groups was extracted and subjected to absolute quantitative real-time PCR for PRRSV detection. 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