Figure 7
Survival analysis of swIAV within-herd fade-out in pig herds reared in 5- (A) and 20-BR system (B) according to the export of piglets batches (consecutively [2 or 4 batches], or at a fixed-interval [24 weeks apart] representing the export of a single batch to a wean-to-finish site). 200 simulations per scenario. χ2 Log rank test = 229, 6 df, p < 0.001.