Ducharme is a contributor to TIME. Ducharme is a contributor to TIME. After a recent COVID-19 exposure, Dr. Christina Astley tested positive on an at-home test—but just barely. The line signifying a ...

A false positive result is possible with a rapid COVID-19 test. It happens when a person does not have COVID-19 but still tests positive for the disease. People can use a rapid COVID-19 test at home ...

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 ...

The BinaxNOW COVID-19 Antigen Self-Test is an FDA-approved at-home test kit. It can detect active infections with SARS-CoV-2, the virus that causes COVID-19, in ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. By now, most of us know the basics of taking a COVID-19 test at home. With cases, test positivity and hospitalizations due to ...

COVID-19 rapid tests are easy to take—and then toss. So most people never report their results, which leaves health officials with an incomplete picture of how much virus is circulating and where. The ...

Some 50% of people who test positive for Covid-19 on a rapid test after five days of infection are likely no longer contagious, a Journal of the American Medical Association study released on ...

DALLAS — UT Southwestern researchers have created a rapid COVID-19 test that can identify different variants of the coronavirus in as little as four hours. The researchers hope doctors can use their ...

The Food and Drug Administration on Wednesday authorized the first rapid coronavirus test that doesn’t need any special computer equipment to get results. The 15-minute test from Abbott Laboratories ...

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 ...