Objective: To estimate the prevalence of SARS-CoV-2 infection among workers in the Espírito Santo prison system between August and September 2020. Methods: A stratified sample survey through interviews and serological tests for SARS-CoV-2.Results: In the 986 respondents, the prevalence of SARS-CoV-2 infection was 11.9% (CI95% 8,1%;15,7%) among health professionals and 22.1% (CI 95%; 18,8%; 25,3%) among prison o...