Sonja Miskulin, a wheelchair-bound former translator suffering from dementia, is cared for by a nurse. (Photographer: Bartek Sadowski/Bloomberg)

A Blood Test Can Predict Dementia. Trouble Is, There's No Cure

(Bloomberg) -- Nobel prizewinner Koichi Tanaka says the predictive blood test for Alzheimer’s disease he and colleagues spent almost a decade developing is a double-edged sword.