This article was on the Scientific American web site. They give permission to pass on the link:
Renewed Hopes for Vaccine to Treat Alzheimer's
http://www.sciam.com/article.cfm?chanID=sa003&articleID=000D1595-C153-148D-80D483414B7F4945
Renewed Hopes for Vaccine to Treat Alzheimer's
http://www.sciam.com/article.cfm?chanID=sa003&articleID=000D1595-C153-148D-80D483414B7F4945