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 ...

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 ...

Jan 10 (Reuters) - The fast-spreading Omicron variant has made us more reliant on rapid at-home antigen tests to tell us if we have COVID-19. But should we be swabbing our throats as well as our noses ...

Most of us are used to a certain routine by now for when we feel sick. If we feel a little feverish, or start coughing, we reach for an at-home testing kit that tells us, with a quick nasal swab and ...

Is that tickle in your nose COVID-19, or just a cold? Answering that question has proven to be difficult as Americans struggle to access coronavirus testing around the country. At-home rapid antigen ...

What does it mean if a person's rapid antigen test result comes back positive after five days of isolation due to COVID-19? According to the experts, that person is most likely still carrying a viral ...