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 ...

Welcome to what some experts say is the country’s second largest COVID wave since the start of the pandemic. In the past few weeks, there’s been a striking increase in new cases, hospitalizations, and ...

SAN FRANCISCO -- The recent outbreak of the omicron variant has many people running for the store for an over-the-counter rapid test. But simply taking the test once isn't enough to tell you if you ...

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 ...

The FDA has extended the shelf life for some COVID-19 tests. Now that allergy season is here, many are finding themselves with symptoms asking: Is it allergies or a cold? COVID? Something else? Since ...

Nothing puts a damper on your holiday plans like a positive COVID-19 test. But what if that line is super faint? Do you still have COVID-19 —or can you go ahead and attend your office party like you ...