Overall, a blood test for Alzheimer’s disease, such as the one described in the new study, can be used to help diagnose both a person experiencing early memory loss, as well as before a patient ...

If you could take a simple blood test that could detect multiple types of cancer while they’re still in an early and treatable stage, would you? For many, the answer would be a resounding yes ...

Lab-developed blood tests have been used primarily by researchers, or by specialists in large medical centers. The test cleared by the FDA is likely to attract a much broader audience.

The F.D.A., and Alzheimer’s experts, emphasized that the blood test should be given only to people who are already experiencing cognitive decline and are ages 55 and older.