Dr. Damien Barrett:

It is not so much the vaccination. The studies suggest reasonable efficacy in cattle but it comes down to the differentiation between animals. We are obliged to continue to have an eradication programme under the animal health law. With the current test technology we have, we cannot differentiate between which animals have been vaccinated. An animal that has been vaccinated will give an immune reaction that is similar to that of an infected animal. That is the crux of it.