Two tests are widely available to see if someone has the virus: a polymerase chain reaction swab, or PCR test, and a less invasive antigen test. While both methods have the same goal, Jon Baker ...

Early in the pandemic, the message from governments of all levels was crystal clear: If you have symptoms, get a PCR test. While that still largely holds true, rules about who should get tested ...

Timely and reliable testing is essential to prevent surges in new Covid-19 cases. Nasal swab RT-PCR testing is most commonly used for diagnosing the air-borne disease, all thanks to its precise ...

opens new tab for PCR tests due to Omicron overwhelms laboratories. As a result of recent studies, some experts in the United States have now advised antigen test users should swab the throat ...

This step-by-step guide explains how coronavirus swab-the-nose-and-throat tests work ... Here's how these real-time RT-PCR* tests actually work, from start to finish: Related stories "Who you ...