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 ...

Rapid COVID tests are convenient and easy to use because you can take them at home. But it's important to know how to interpret their results, when you should take another rapid test and when you ...

To quickly confirm an asymptomatic case of COVID-19, a second rapid test within an hour of a positive result can boost the accuracy of the result from 38 percent to 92 percent, according to a new ...

The vaccines are here. Why do we still need testing? Testing is our eye on the virus. Without testing, we can’t see where it is or where it is going. As fall and winter set in, outbreaks will again ...

PCR tests successfully detected the virus days before the rapid tests did, according to a new study. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...