25 years ago, he was at high risk for Alzheimers

Doug Whitney, a 76-year-old with a genetic mutation that guarantees early-onset Alzheimer's, has defied expectations, remaining cognitively healthy decades past his predicted diagnosis. He has defied a genetic fate that claimed dozens of his family members. At 76, he remains cognitively healthy, decades past the age when early-onset Alzheimers disease was expected to strike him. Researchers are studying his unique resilience, hoping to unlock secrets to combat the devastating disease.