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 ...

With Covid-19 cases up across the country, many people are once again relying on home tests to guide decisions about going to work and sending their kids to school and other activities. A lot of those ...

NEW YORK -- Millions of Americans have purchased rapid COVID-19 tests online or at local stores and signed up to receive test kits through a free government program. Unlike conventional, lab-processed ...

With new COVID cases in Florida on the rise, taking an easy-to-get rapid test can give you quick results. But the timing has become tricky. If you have COVID-19 symptoms, such as fever, cough, ...

For instance, if you only get a very faint line, it might be hard to know whether or not that means your results are positive. I know how that feels firsthand. After more than two years of evading ...

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 ...

COVID-19 cases have been slowly ticking up in the U.S., with the omicron BA.2 subvariant now the dominant strain in the country. At the same time, rapid at-home antigen tests have become the first ...

Some antigen tests, including the rapid COVID-19 test made by the Abbott BinaxNOW and Quidel QuickVue brands, may fail to detect if you have omicron, according to new data released this week. In ...

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 ...

It was possible -- albeit rare -- for people not infected with SARS-CoV-2 to have persistent false positive rapid antigen COVID-19 tests, longitudinal data showed. Among a large cohort of over 11,000 ...