At present, there is no treatment to stop the Alzheimer's. Bill Gates wants to make a sizeable attempt to change that. From a report:He is to invest $50 million in the Dementia Discovery Fund, a venture capital fund that brings together industry and government to seek treatments for the brain-wasting disease. The investment -- a personal one and not part of Gates' philanthropic Bill & Melinda Gates Foundation -- will be followed by another $50 million in start-up ventures working in Alzheimer's research, Gates said. "It's a huge problem, a growing problem, and the scale of the tragedy -- even for the people who stay alive -- is very high," he said. Despite decades of scientific research, there is no treatment that can slow the progression of Alzheimer's. Current drugs can do no more than ease some of the symptoms.