Add Yahoo as a preferred source to see more of our stories on Google. For any American wondering if they have Covid-19, there are two kinds of tests available: polymerase chain reaction (PCR) and ...

As of May 2022, the U.S. is experiencing another uptick in the number of COVID-19 cases. High rates of infection in Europe and Asia, along with the continued emergence of new sub-variants, such as ...

A COVID-19 antigen test with results that can be read directly from a test card received an emergency use authorization on 26 August, the US Food and Drug Administration (FDA) announced. The ...

As more people turn to rapid home test kits to detect COVID-19, a new study from researchers at the University of Massachusetts Chan Medical School suggests their accuracy is on a par with PCR tests ...