Implementation of a COVID-19 Infection Control Plan in a Large Urban Jail System.

When the COVID-19 pandemic hit the United States, the number of people confined in correctional facilities on a single day numbered 1.8 million. Incarcerated people are at an increased risk of contracting and spreading SARS-CoV-2. Recommendations from the Centers for Disease Control and Prevention on case recognition, management, isolation, and contact tracing are particularly challenging in jails because of the high turnover of incarcerated people. Beginning in late February 2020, the Department of Correctional Health Services in the Los Angeles County Jail system implemented a multipronged COVID-19 mitigation plan that was progressively amended in accordance with local and national recommendations. This plan entailed the creation of housing for people under investigation, SARS-CoV-2 screening upon entry, a mass-testing program, and identification and monitoring of medically vulnerable people. After the identification of the first laboratory-confirmed case on March 29, 2020, predictive models were generated to visualize potential disease spread and gain support for mitigation strategy planning, which forecasted approximately 3300-4600 cumulative cases during a 278-day period. From March 7 through December 31, 2020, the percentage positivity among unique people tested for SARS-CoV-2 was 11.6% (3933 of 33 921 tested). Among those screened at intake, the percentage positivity was 2.0% (502 of 25 702 tested). The ethnic distribution among people with a positive SARS-CoV-2 test result was largely representative of the overall jail population, and most people were asymptomatic. A sustainable, multifaceted mitigation plan that relies on collaboration among medical, custodial, and local public health personnel is essential for limiting the spread of SARS-CoV-2 infection in correctional facilities.