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 ...

For any American wondering if they have Covid-19, there are two kinds of tests available: polymerase chain reaction (PCR) and rapid antigen (sometimes just called “rapid tests”). The two tests work in ...

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 ...

COVID-19 rapid tests are easy to take—and then toss. So most people never report their results, which leaves health officials with an incomplete picture of how much virus is circulating and where. The ...

The pandemic isn’t over. Although it's no longer considered a national and public health emergency, we're currently seeing a surge in cases and the spread of two new variants—EG.5 (Eris) and BA.2.86 ( ...

The Food and Drug Administration on Wednesday authorized the first rapid coronavirus test that doesn't need any special computer equipment to get results. The 15-minute test from Abbott Laboratories ...