Advertisement
In this April 2, 2008 file photo, a physician's assistant in a surgery at Bad Aibling, southern Germany, takes a blood sample from a patient.

In this April 2, 2008 file photo, a physician's assistant in a surgery at Bad Aibling, southern Germany, takes a blood sample from a patient. Researchers are working on an experimental blood test that appears very accurate at revealing how much of the telltale Alzheimer’s brain deposits a patient has, and they hope it might be a much-needed first step to see who needs definitive testing for the disease. (AP Photo/Uwe Lein, File)

Advertisement
Advertisement