A combined blood test for cognitive decline has a 90% accuracy rate in determining whether memory loss is due to Alzheimer’s disease. Dr. Sanjay Gupta explains. When Penny Ashford’s father was ...

Scientists discovered that certain blood proteins linked to brain injury and inflammation strongly correlate with early signs of memory and cognitive decline, especially in Hispanic and Latino adults.

PARIS — Scientists are closing in on a long-sought goal: A blood test to screen people for Alzheimer's disease. An experimental test did a good job of indicating how much of the telltale Alzheimer's ...

Scientists at the University of East Anglia and Oxford Biodynamics have developed a high accuracy blood test to diagnose chronic fatigue syndrome, also known as myalgic encephalomyelitis (ME/CFS).

Researchers believe they have developed the first dedicated blood test to diagnose chronic fatigue syndrome (CFS), also known ...

Editor’s note: CNN Chief Medical Correspondent Dr. Sanjay Gupta and writer Sandee LaMotte are part of the study covered in this story and have written about their experiences. When Penny Ashford’s ...