Please Explain: Alzheimer’s

An estimated 27 million people worldwide are afflicted with Alzheimer’s disease. Find out what Alzheimer’s is all about, and whether there are ways to prevent it or slow its progress. Dr. Richard Mayeux is co-director of the Taub Institute of Research on Alzheimer’s Disease and the Aging Brain at Columbia University Medical Center. Dr. Samuel Gandy is a neurologist at Mount Sinai.