From the Document: "This document provides a summary of considerations for use of SARS-CoV-2 [severe acute respiratory syndrome coronavirus 2] (the virus that causes COVID-19 [coronavirus disease 2019]) antigen testing in nursing homes and is intended for nursing home providers and state and local public health departments. Antigen tests are available as point-of-care (POC) diagnostics for SARS-CoV-2. They have a rapid turnaround time, which is critical to the identification of SARS-CoV-2 infection and rapid implementation of infection prevention and control strategies. These tests can augment other testing efforts, especially in settings where RT-PCR testing capacity is limited or testing results are delayed (e.g., >48 hours). In general, these POC antigen tests have a lower sensitivity, but similar specificity, for detecting SARS-CoV-2 compared to reverse-transcriptase polymerase chain reaction (RT-PCR) tests."
Centers for Disease Control and Prevention: https://www.cdc.gov/