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The Cq-values (y-axis) of 16 replicates of the type 2- (3a), PRRSV-HP- (3b) and type 1- (3c) assays using 10-fold dilution series of adequate virus strains (x-axis: log 10 initial quantity) are shown. Mean values are indicated alongside of each box plot, standard deviations are depicted in parentheses. Box plots were designed supported by R software [38].
