A Nobel Prize-winning researcher has said that the entire British population should be tested for vCJD, the human form of BSE (mad cow disease). Professor Stan Prusiner, who won the Nobel Prize in 1997 for research into BSE, has backed calls from fellow scientists and interest groups for mass screening. There have been 588 cases of sporadic CJD in Britain over the last ten years, and fears have risen recently that the incidence could be more widespread than believed. These 588 cases come on top of the 117 cases of the variant CJD that are usually related to BSE.