Scientists claim to have reversed Alzheimer's in mice

It's one of the world's biggest killers, but Alzheimer's disease could soon be treated with a jab. Scientists in Spain claim to have reversed the disease in mice using nanoparticles - and they say the same technique could one day be effective in humans. The nanoparticles, invisible to the naked eye, are less than 200 nanometres in diameter - or about 0.25 per cent the width of a human hair. Study leader Giuseppe Battaglia, a professor at the Institute for Bioengineering of Catalonia (IBEC) in Barcelona, called the new approach 'remarkable'.