A team of researchers in Himachal Pradesh, India, has wrapped a beneficial soil bacterium in a microscopic armor made of ...

A tuberculosis (TB) skin test involves a small injection of tuberculin under your skin, which a healthcare professional will check 48 to 72 hours later for a raised bump called an induration. Whether ...

Known also as an E2 test, an estradiol test measures the amount of the hormone estradiol in your blood, which is essential for bone and joint health in females and helps control how fat is distributed ...

An antinuclear antibody (ANA) test checks your blood for certain types of antibodies called autoantibodies. Autoantibodies commonly develop in people with autoimmune conditions, but they can show up ...

The best at-home COVID-19 tests are FDA-authorized, easy to use, accurate, quick, and can also detect flu viruses. Lauren Paige Richeson is an Editor at Health, where she’s been writing, editing, and ...