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 ...

The potential for IgM cross-reactivity with rheumatoid factor–positive serum samples was observed in blood tests used to detect IgM SARS-CoV-2 by means of gold immunochromatographic and enzyme-linked ...

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 ...

Mesa Biotech has recalled some of its COVID-19 tests because they may give false positive results after it was determined the facility where they were made was contaminated. The recalled Accula ...

As COVID-19 case numbers have been slowly rising across the United States, Americans are turning to at-home rapid antigen tests to suss out whether they are sick from a good-old fashioned cold, the ...

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 ...