As Covid cases rise, at-home tests are a critical tool to keep yourself and others safe. Here are answers to a few common questions about when and how to use them.

A video journalist demonstrates how to take a rapid antigen test. At-home tests and the omicron variant When the omicron variant emerged in late November 2021, scientists quickly responded to ...

Four rapid Covid-19 tests are available to each household in the US for free from the federal government.

Eventually, rapid antigen testing was performed in and beyond health service settings and beyond in conjunction with reverse-transcription-polymerase chain reaction (RT-PCR) analysis.

A previous version of QuidelOrtho's rapid antigen coronavirus diagnostic was the first to receive the FDA's emergency use authorization in May 2020.