From the Purpose: "CDC [Centers for Disease Control and Prevention] has recommendations for when nursing homes should test all residents and healthcare personnel (HCP) in nursing homes. This document describes considerations for performing facility-wide testing among nursing home residents and HCP. Facility-wide testing involves testing all residents and HCP for detection of SARS-CoV-2 [severe acute respiratory syndrome coronavirus 2], the virus that causes COVID-19 [coronavirus disease 2019], and can be used to inform infection prevention and control (IPC) practices in nursing homes. This document is intended for health departments and nursing homes conducting viral testing for current infection, such as reverse-transcriptase polymerase chain reaction (RT-PCR)."
Centers for Disease Control and Prevention: https://www.cdc.gov/