Fig. 3From: Production results from piglets vaccinated in a field study in Spain with a Type 1 Porcine Respiratory and Reproductive virus modified live vaccineViremia in % positive pigs (qualitative) by qPCR at the different sampling times in 69 unvaccinated pigs (22, 24 and 23 in weeks groups 1, 2 and 3, respectively). Percentage of positive pigs and confidence interval 95 %Back to article page