The links between Alzheimer's disease and other afflictions such as heart disease might hold the key to unlocking how the disease kills brain cells and steals memories and lives, a local researcher said. View the photo gallery

WASHINGTON - Preliminary results from the first human study of a possible Alzheimer's disease vaccine seem to show it is safe for patients, a pharmaceutical company announced Tuesday. Scientists said it is far too soon to tell if the vaccine will actually do patients any good.