Mad cow disease is back as news comes that 14,000 Britons are estimated to be carrying the disease.
Over half the population is at risk of contraction through blood transfusion, and there's no blood scan to spot if anyone has it.
Picture shows sculpture, ''Self'', by Mark Quinn, who also made the controversial ''Pregnant'', on display on the fourth plinth of Trafalgar Square.
''Self'' is made from 4.5 litres of his own frozen blood.
Stories that it was destroyed by Nigella Lawson (cook and wife of the then owner Charles Saatchi), when she was having a new kitchen put in and the freezer was unplugged, were untrue. It was later sold to an American collector for £1.5 million.
If Mark ate British beef before he made this sculpture, it may contain the CJDv virus protein.