Fig. 6

Viral loads in piglet tissue samples. Tissue samples were collected from piglets that were euthanized when they were dying or at the end of studies. A, B The viral RNA in the lungs (A) and brains (B) from each pig in the different groups was then detected using absolute quantitative real-time PCR. Differences between groups were assessed using a Student’s t-test; statistical significance was denoted as follows: *p < 0.05, **p < 0.01, and ***p < 0.001