From the Introduction: "The CDC [Centers for Disease Control and Prevention] has noted that the confined nature of correctional facilities, combined with their congregate environments, 'heighten[s] the potential for COVID-19 [coronavirus disease 2019] to spread once introduced' into a facility. According to BOP [Federal Bureau of Prisons] data, as of July 14, 2020, 8,642 inmates and 887 staff in BOP-managed institutions and community-based facilities have tested positive for COVID-19. However, testing within most BOP facilities has been limited. In those institutions where widespread inmate testing has been undertaken, including at one of the four facilities at the Federal Correctional Complex (FCC) Lompoc in Santa Barbara County, California, the percentage of inmates testing positive has been substantial. For example, at the one FCC Lompoc facility where all inmates were tested, the number of inmates testing positive for COVID-19 exceeded 75 percent as of May 11. Separately, as of early May, at least 53 of the 416 staff members at FCC Lompoc had been tested and approximately 60 percent (32 of 53) of those individuals tested positive."
Department of Justice, Office of the Inspector General, Pandemic Response Report 20-086
U.S. Department of Justice Office of the Inspector General: https://oig.justice.gov/