Rosemary Navarro, 40, looks through old childhood photographs at her home in La Habra, Calif. Her mother, Rosa Maria Navarro, passed away in 2009 from Alzheimer's. Heidi de Marco/Kaiser Health News hide caption toggle caption Heidi de Marco/Kaiser Health News Shots - Health News Early Alzheimer's Gene Is A Curse For Families, A Gift For Science Kaiser Health News December 27, 2016 They couldn't figure out why so many relatives got Alzheimer's in their 40s. Then they found out they share the rare Jalisco mutation. Their tragedy is helping scientists untangle the disease.