Read:heart disease and stroke are the world"s biggest killers. millions of people in Britain take cholesterol-lowwering drungs to reduce theirrisk. Now scientist from the Netherlands Organisation of Applied Scientific research believe they may have found an alternative treatment.It"s a vaccine that body"s immune system get rid of bad cholesterol from the blood. The first humam trials are now under way , but researchers say it will take six years before they know if the jab is safe and effective enough to get regulatory approval.