Fig. 2From: Vaccination of piglets at 2 and 3 weeks of age with Ingelvac PRRSFLEX® EU provides protection against heterologous field challenge in the face of homologous maternally derived antibodiesAntibody levels in piglets before and after vaccination. Boxplot of S/P ratios of animals before vaccination and 7-weeks after vaccination. Whiskers represent the min and max ratioBack to article page