A polymerase chain reaction (PCR) test detects genetic material from a pathogen or abnormal cell sample. Ways of collecting samples include a nasal swab, a saliva swab, or taking a sample of blood.

The best at-home STD tests offer fast and accurate results, use CLIA-certified labs, and accept HSA/FSA. Most modern STD tests are highly accurate, and when conducted correctly, at-home tests estimate ...

A nuclear stress test, also called myocardial perfusion imaging (MPI) or a thallium stress test, uses a radioactive tracer to show how blood flows through your heart muscles during exercise and at ...

Electromyography (EMG) is a diagnostic test that measures how well the muscles respond to the electrical signals emitted to specialized nerve cells called motor nerves. EMG tests are safe and pose ...

As the nation experiences what many experts believe is the second-largest wave of COVID infections since the pandemic started, many Americans will be checking to make sure they don’t have the ...

A hydrogen breath test can help determine if you have one of a few conditions that can affect your digestive health. It may tell you if you have too much bacteria in your gut, if you are lactose ...

What Are At-Home Colon Cancer Tests? The gold standard screening test for cancer in your colon or rectum, colorectal cancer, is a colonoscopy. This is done at a doctor's office under sedation, after a ...

How safe is your tap water? Finding out can take some time, effort, and money, but it’s worth doing. Most people on municipal water who pay their own bill should receive an annual water quality report ...

Standardized, repeatable testing is central to all of the 1,500-plus reviews we publish annually. Here's how we test every laptop that hits the bench at PC Labs using 24 different benchmarks. From the ...