WASHINGTON — One of the quickest ways to know if you have COVID is the rapid tests. If you are positive, a line appears on the test kit. However, you may have noticed that line can be bold or faint.

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 ...

The Food and Drug Administration said Tuesday that preliminary research shows some rapid antigen tests may be less sensitive at detecting the highly contagious omicron variant of the coronavirus. The ...

WHO noted that prequalified tests can now be prioritized in pooled procurement mechanisms, which help lower prices, stabilize ...

The Big Ten has 14 members, but it adds an unofficial 15th this fall based in San Diego. The conference has contracted with Quidel Corporation to provide the SOFIA SARS-2 rapid antigen COVID-19 test ...

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 ...

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 ...

Taking a COVID-19 test at home seems simple enough: If you get a line, you're positive for the coronavirus. But what if your results aren't so obvious? For instance, if you only get a very faint line ...