NAAT tests, including PCR tests, are more likely to detect the virus, and are considered the “gold standard” for COVID-19 tests. Samples are usually taken in a health-care setting and sent to a lab ...

SAN FRANCISCO -- There has been a lot of talk about testing for the coronavirus, but you may not entirely understand what the different tests are for. The coronavirus makes some people sick, some ...

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 ...

Antibody tests weren't meant to gauge COVID-19 vaccine immunity. Dr. Anthony Fauci said they also wouldn't be the best sign you need a booster.

Herd immunity is important because it defines when a whole community is protected. That includes people who haven't caught the disease, people who had the illness and recovered, and people who got a ...

COVID-19 infections are rising again across the U.S. Here's which symptoms to look for and how to protect yourself over the ...

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 ...

A new study analyzing the immune response to COVID-19 in a Catalan cohort of health workers sheds light on an important ...