Fig. 6From: Immune response enhancement by dietary supplementation with Caesalpinia sappan extract in weaned pigs challenged with porcine reproductive and respiratory syndrome virusEffect of supplementation with CS extract on the number of PRRSV RNA copies in the lung following PRRSV challenge. The data are shown as the mean ± SD. The asterisk indicates significant differences (**** p < 0.0001) between groupsBack to article page