Figure 1.

Distribution of (a) external and (b) internal biosecurity levels for participating Belgian (n = 15) and Dutch (n = 13) farms per coaching period. The higher the biosecurity scores are on the y-axis, the better the disease prevention measures in place are. The line within each box represents the median value. The lower and upper boundaries of each box correspond to the 25th and 75th percentiles, respectively. Whiskers below and above each box show the 10th and 90th percentiles. Points below and above the whiskers represent outliers.