Silver Book Fact
About 5.2 million people in the U.S. have Alzheimer’s disease in 2008.
Alzheimer's Association. 2008 Alzheimer’s Disease Facts and Figures. Alzheimers Dement. 2008; 4(2): 110-33. http://www.alzheimersanddementia.com/article/S1552-5260(08)00033-2/fulltext