Scientists Close in on Blood Test for Alzheimer’s

In this July 9, 2019 photo, Dr. Jori Fleisher, neurologist, examines Thomas Doyle, 66, at the Rush University Medical Center in Chicago. Doyle, 66, hopes blood tests may someday replace the invasive diagnostic testing he endured to be diagnosed 4.5 years ago with Lewy body dementia. AP Photo/Teresa Crawford

LOS ANGELES—Scientists are closing in on a long-sought goal—a blood test to screen people for possible signs of Alzheimer’s disease and other forms of dementia.

On July 15 at the Alzheimer’s Association International Conference, half a dozen research groups gave new results on various experimental tests, including one that seems 88% accurate at indicating Alzheimer’s risk.