Figure 4: Values of milk anti-p80 BVD Ab binding % plotted against total fraction of all cows accounted for as values increased (Ab in milk of cows is inversely related; higher %'s indicate less Ab in cows' milk). The 11 cows in the upper right corner are the 11 cows with Ab binding % > 90%, indicating possible Persistently Infected BVD status or vaccine failures. Values shown are for October Ab binding % in fresh milk with no Bronopol preservative pill.