Add Yahoo as a preferred source to see more of our stories on Google. For any American wondering if they have Covid-19, there are two kinds of tests available: polymerase chain reaction (PCR) and ...

Two types of COVID-19 tests, the rapid antigen test and the polymerase chain reaction (PCR) test, are available in the United States. The PCR typically relies on lab testing and is still considered ...

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 ...

CHICOPEE, Mass. (WWLP) – As more COVID rapid tests become available you might be thinking about what type of test is best to get. COVID testing sites are seeing thousands of people every day, but what ...

Ducharme is a contributor to TIME. A medical worker performs a COVID-19 test at a screening center in Saint-Denis, France, on Nov. 4, 2020. Ducharme is a contributor to TIME. If you had COVID-19 ...

COVID-19 tests are in greater demand than ever, and new data about the Omicron variant can make picking and using different types of tests confusing. Molecular tests for COVID-19, like the "RT-PCR" ...

Researchers often call the polymerase chain reaction test – known as the PCR test – "the gold standard" for detecting the COVID-19 virus. The test is considered highly reliable and effective, and it ...

A polymerase chain reaction (PCR) test detects genetic material from a pathogen or abnormal cell sample. Ways of collecting samples include a nasal swab, a saliva swab, or taking a sample of blood.