For most people, having an at-home COVID test or two handy is just a normal part of life these days. But, if you happen to take a test and get a positive you weren’t expecting, it’s more than ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." TAKING A COVID-19 TEST is probably your first instinct when you wake up with a fever or sore throat or ...

PCR tests are the gold standard for COVID-19 diagnosis, but they’re not always accurate. False positives and false negatives both have negative repercussions and risks for patients. New research ...

A study that analyzed genes in nasal swabs from asymptomatic people who tested positive for SARS-CoV-2 showed the results could be attributed to occupational exposure rather than infection. For some ...

Even very accurate tests in the lab can result in a vast majority of false positives in the field. This “false positive paradox” from testing people without symptoms led to a “false positive ...

There are three different ways to test for COVID-19: PCR tests, antigen tests and antibody tests. Each method is best for a different stage of COVID-19 infection. Used in sequence, all three methods ...

PCR swab tests that look for viral RNA have become the gold standard for identifying infection with the SARS-CoV-2 virus, but their results aren't 100% accurate. Researchers report that testing for ...

A new study analyzed genes in nasal swabs from asymptomatic people who tested positive for SARS-CoV-2. The study found a cluster of people who worked together in a lab that focuses on plasmids.