In addition, the average daily weight gain (ADG) Per litter from vaccinated or unvaccinated sows was calculated at the indicated time points (Fig.3).Following Virus challenge, litters from vac cinated sows began to decline in ADG At 2 Dpc and continued to lose body weight until 6dpc. However, Starting at 7 dpc, those animals exhibited a gradual increase in body weight gain and consistently had an ADG Of 100–300 G during the remaining exper imental period. In contrast, after 1 dpc, litters from unvaccinated