Wendy Nelson shows Reuters the results of a genetic test she took through 23andMe, which revealed that she carries two APOE4 gene variants, indicating an increased risk of Alzheimer’s disease, at her home in Foxborough, Massachusetts, U.S., March 21, 2023. Wendy Nelson’s mother died from Alzheimer’s disease, her father suffers from it, and genetic tests also show that her three daughters each carry one APOE4 gene variant. REUTERS/Brian Snyder