For instance, if you only get a very faint line, it might be hard to know whether or not that means your results are positive. I know how that feels firsthand. After more than two years of evading ...

Over-the-counter multiplex tests for more than one illness may soon come to a pharmacy near you. Paco Burgada/iStock via Getty Images A scratchy, sore throat, a relentless fever, a pounding head and a ...

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 ...

Polymerase chain reaction (PCR) and rapid (antigen) tests for COVID-19 both involve taking a swab. Results for a PCR test take longer, as it needs to go to a laboratory. It is more costly but tends to ...

A false positive result is possible with a rapid COVID-19 test. It happens when a person does not have COVID-19 but still tests positive for the disease. People can use a rapid COVID-19 test at home ...