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

An eye scanner can detect biological aging, rather than your chronological age. It decodes the "record of how a person is aging at the molecular level."

COVID-19 tests that have patients swab their own noses are as accurate as the more invasive tests that health care workers administer, a small study finds.

Experts call for large-scale viral testing in children, contract tracing, and other actions to avoid compounding the COVID-19 crisis as schools reopen.

When interpreting COVID-19 antibody tests, caution is key. Here, experts explain the best way to use the tests and why false positives are so concerning.

Phosphate buffered saline could carry COVID-19 testing samples safely. That could fix a testing bottleneck due to viral transport medium shortages.

Nearly all people hospitalized with COVID-19 develop antibodies against the virus within six days of testing positive, new research indicates.

A proposed platform uses nanoparticles or magnetic levitation to spot a "fingerprint" for COVID-19 diagnosis and checking death risk.

A new way to make reagents for COVID-19 testing could boost our capacity for testing and make producing future tests easier.

A biomarker in newborns may signal autism spectrum disorder months or even years before symptoms begin, say researchers.