COVID-19 tests used to be able to detect a positive case within the first 48 hours, but many results are now delayed until four days after symptoms appear, according to the LA Times. Elizabeth Hudson, ...

A T-cell test developed by Adaptive Biotechnologies could become the first commercially available test of its kind, and it may be more effective at detecting past COVID-19 infections than antibody ...

COVID-19 certainly didn't take a vacation this summer. Virus levels in the US have been on the rise for weeks, but it's hard to know exactly how widely it's spreading. Federal data suggests that the ...

STATEN ISLAND, N.Y. — With the terrifying coronavirus (COVID-19) pandemic of 2020 behind us and the world now returned to normal, many people have moved away from vaccination or even testing for the ...

EVANSTON, IL — Is it possible you were infected with a mild form of COVID-19 and didn’t know it? How robust is your body’s immune response to the vaccine, and how will we know whether we’ve reached ...

As COVID cases rise over the winter, health experts are finding that it’s taking longer to figure out if someone is infected. When COVID-19 antigen tests — also known as rapid tests — first came out, ...

As mask mandates are lifted and restrictions removed in a step toward normalcy, a test to measure immunity would be a powerful tool to measure individual risk. In 2010, doctors told Ben Sobieck, now ...

"We feel this pressure because we want to help people." Antibody tests, which reveal whether someone has been infected with the novel coronavirus, have been touted as key to reopening the economy and ...