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 ...

BOSTON (CBS) - A Carlisle man tells WBZ he thought a negative rapid 15-minute Covid-19 test was all he needed to avoid quarantine after vacation. But he was not all set. While the FDA said positive ...

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 ...

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 ...

KANSAS CITY – During the coronavirus (COVID-19) pandemic, it is not surprising to see the priorities of consumers – when it comes to the safety of their food – are higher than ever before. Even with ...

To help combat Omicron, the Biden administration is opening up more Covid-19 testing sites and delivering 500 million tests to Americans. WSJ’s Daniela Hernandez breaks down why testing is still a ...