Like PCR tests, antigen tests usually require a nose or throat swab. But unlike PCR tests, which look for genetic material from the SARS-CoV-2 virus, antigen tests look for proteins that live on ...

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 ...

A medical worker in Paris takes a nasal-swab sample for a diagnostic PCR test for the virus that causes COVID-19 in February. False claims about PCR tests have been circulating on social media ...

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 ...

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 ...