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.

Online color blindness tests may give people an idea of whether they may be color blind and if so, which type of color blindness they might have. This information comes from the National Eye Institute ...

A toxicology screen is a test that determines the approximate amount and type of legal or illegal drugs that you’ve taken. It may be used to screen for drug abuse, to monitor a substance abuse problem ...

If you’ve recently been tested for HIV or you’re thinking about getting tested, you might have concerns about the possibility of receiving an incorrect test result. With current methods of testing for ...