"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." TAKING A COVID-19 TEST is probably your first instinct when you wake up with a fever or sore throat or ...

It was possible -- albeit rare -- for people not infected with SARS-CoV-2 to have persistent false positive rapid antigen COVID-19 tests, longitudinal data showed. Among a large cohort of over 11,000 ...

At-home rapid COVID-19 tests can reveal more about viral load than a simple positive/negative result, according to experts. "By definition, the basic technology suggests that you somehow have to go ...

Medically reviewed by Laura Young, MD Key Takeaways A positive herpes IgG test result means you have or had a herpes ...

Several conditions can cause a false-positive syphilis test result. However, healthcare professionals often use two different tests to diagnose a person with syphilis. Syphilis is a sexually ...

Home pregnancy tests are convenient and generally reliable, but there can be situations where they show a false positive. Home pregnancy tests are convenient and generally reliable, but there can be ...

Hepatitis A blood tests check for immunoglobulin M (IgM) and immunoglobulin G (IgG) antibodies. An IgG-positive and IgM-negative result may suggest immunity to hepatitis A. A doctor may request a ...

An international study published in the Malaria Journal claims that a widely used test for detecting malaria is delivering too many inaccurate false-negative results and is “not fit for purpose”. The ...

A case of false-positive alcohol toxicology tests believed to be linked to treatment with sodium-glucose cotransporter 2 (SGLT2) inhibitors raises concern that the widely used diabetes drugs could ...