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 ...

The explosion of omicron cases in the U.S. smack in the middle of the holiday season is forcing Americans to rely more heavily on rapid tests prior to congregating with friends and family. In some ...

Polymerase chain reaction (PCR) tests were the first available for spotting the coronavirus. They work by detecting the virus’s genetic material, and are very accurate. Then came rapid tests, also ...

A PCR test is often considered the gold standard for detecting coronavirus infection. It’s the test some employers want employees to take before returning to work after having Covid-19, and the one ...

A common rapid at-home COVID test has become the subject of a recent product recall over concerns the antigen test hasn't received proper U.S. authorization. The Food and Drug Administration issued a ...

The emergence of the omicron variant is spurring a scramble for COVID-19 lateral flow tests, to try and ensure safe holiday parties and family gatherings. The U.K. is dealing with a supply crunch for ...

Only a few years ago the benefits of lateral flow diagnostic tests weren’t widely understood outside of scientific circles. The reason most people came into contact with the technology was through the ...

The makers of at-home rapid Covid tests are scrambling to meet soaring demand as consumers prepare for holiday gatherings and tests are suddenly in short supply amid another coronavirus surge.

How do rapid antigen COVID-19 tests work? Why did the US government just pledge to buy 280 million of them? And is that even enough to help curb the spread of the virus? As part of President Biden’s ...