An outbreak of coronavirus disease began in a large penitentiary complex in Brazil on April 1, 2020. By June 12, there were 1,057 confirmed cases among inmates and staff. Nine patients were hospitalized, and 3 died. Mean serial interval was ≈2.5 days; reproduction number range was 1.0-2.3.
Keywords: Brazil; COVID-19; SARS-CoV-2; coronavirus disease; infectious diseases; outbreaks; overcrowding; prisons; public health; severe acute respiratory syndrome coronavirus 2; underlying medical conditions; viruses; zoonoses.