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.

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.