香蕉视频

Scientists have announced a small but important step in the development of an effective cattle vaccine to prevent bovine tuberculosis. They have identified a "biomarker" using sophisticated molecular technology that allows them to predict vaccine efficacy. David Williams, chairman of the Badger Trust, which strongly supports vaccination of both cattle and badgers, said: "We welcome this refinement in laboratory technique, part of the progress towards the long-awaited goal of an effective cattle vaccine.