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<p>Before a decision can be made to make an investment in field trials, we need to
be confident that we have an effective DIVA test (a TB test to differentiate infected
from vaccinated animals). The work we have already done shows that the blood test
DIVA is unlikely to be good enough, in that it will yield too many false positive
results leading to slaughter of too many uninfected cattle. So we are now investing
in the development of a more promising skin test DIVA.</p><p> </p><p> </p>
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