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The influence of the proportion of a badger group that is sampled and the choice of test(s) on group-level specificity for diagnosing Mycobacterium bovis. In this example, a threshold of two animals testing positive is required for a group to be considered infected. Where two tests are used togther, results are interpreted in parallel. Note that the y-axis is truncated. IFN-γ, Gamma interferon.
