A simple blood test to diagnose Alzheimer's disease could make early diagnosis and treatment accessible to more people.

Your blood contains a wealth of information about the state of your health. Analyzing the levels of each component is an important part of diagnosis.

A blood test in midlife may predict risk of cognitive decline and Alzheimer's later, according to a new study.

A new rapid test can detect both HIV and tuberculosis at the same time with just a small amount of blood, researchers report.

A highly sensitive blood test can detect a key protein produced by cancer cells in as little as two hours, researchers report.

A new blood test that detects Parkinson’s disease may offer a way to diagnose the condition before nervous system damage gets worse.

Letting people at high risk of PFAS exposure collect their own blood for testing could lead to earlier detection of health problems.

A new test would use just a drop of blood to test for the STI Trichomonas vaginalis, also called trich.

By shining a laser on a drop of blood, mucus, or wastewater, researchers can use the light reflecting back to positively identify bacteria.

Lab testing provides doctors with essential information to help them diagnose and treat disease. Here’s what happens behind the scenes after you roll up your sleeve for a blood draw.