FIG. 1.

Body temperature after infection of pigs with PrV-Ka, PrV-gD⁻ Pass, or PrV-gD⁻ Pass SPH. On day 38 p.i., challenge infection with 5 × 10⁷ PFU of PrV NIA-3 was performed. At this time point, three age-matched, naive piglets were included as controls. Mean values are shown for each group.