Dr. Damien Barrett:

I will not give the Senator an answer off the top of my head. I will come back to him with that later. If I give him a number now, it will probably be wrong. We try to take a risk-based approach. In certain instances, and in relatively small numbers, we will go in there sooner where there is a history. The programme must evolve to the circumstances of individual cases or herds. A one-size-fits-all approach will not necessarily work.