New findings suggest that identifying and treating the diseases of old age should begin by the time people celebrate their 45th birthday.

Researchers have found that specific communication between brain regions is an accurate way to see if a child has ADHD, which is usually tricky to diagnose.

A new microneedle patch is low cost and easy to use. But another feature may offer it's biggest advantage for some: It's almost completely pain-free.

A new lab-on-a-chip device called real-time ELISA combines blood tests to provide something more like a movie than a photo.

Measuring levels of a specific type of Alzheimer's protein in the fluid that surrounds the brain and spine can indicate how far the disease has progressed.

Researchers have created a low-cost, pain-free, super simple malaria test that delivers results in just a few minutes with a microneedle patch.

A simple blood test that doesn't require overnight fasting could identify youth at risk for developing type 2 diabetes later in life.

Fitness information like resting heart rate collected by wearable devices can't diagnose diseases, but it can signal when something is wrong. That can be enough to prompt a COVID-19 test.

Detecting a specific kind of protein in a blood test could help diagnose Alzheimer's disease far before symptoms begin to appear, reasearchers say.