This summer, two drugs under development for Alzheimer’s disease were declared failures, ruining the chances of finding a near-term fix for an illness that is ravaging the memories of more than 5 million Americans. Research by Dennis J. Selkoe, the Vincent and Stella Coates Professor of Neurologic Diseases in the Department of Neurology at Brigham and Women’s Hospital; Reisa Sperling, HMS professor of neurology at Brigham and Women’s Hospital; and Rudolph Tanzi, the Joseph P. and Rose F. Kennedy Professor of Child Neurology at Massachusetts General Hospital, is cited.