Fig. 1From: Development of within-herd immunity and long-term persistence of antibodies against Schmallenberg virus in naturally infected cattlePercentage of anti-SBV antibody positive, doubtful and negative animals among cattle that were sampled for the first time in the respective year. In the December 2011/January 2012 sampling, every animal older than 24 months was included, while thereafter only animals between 24 and 35 months of age were sampled for the first timeBack to article page