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 ...

Add Yahoo as a preferred source to see more of our stories on Google. iHealth COVID-19 Antigen Rapid Test, 2 Pack, $17.98 On/Go At-Home COVID-19 Rapid Antigen Test, 2 Pack, $24.88 (orig. $39.99) You ...

Finding a COVID-19 test has become a real challenge with the spread of the omicron variant. But there is also confusion over which test people should be getting, which is a PCR or antigen? “The two ...

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.

SEATTLE—Frustration continues to build up, as people wait hours to get a Covid-19 test. Many sites around Puget Sound are still closed after the winter blast and appointments are filling up. As health ...

Ducharme is a contributor to TIME. Ducharme is a contributor to TIME. If you had COVID-19 symptoms in 2020, you probably would have masked up and braved a visit to a laboratory, doctor’s office, or ...