Silva AAM da, Lima-Neto LG, Azevedo C de MP e S de, Costa LMM da, Bragança MLBM, Barros Filho AKD, et al. Population-based seroprevalence of SARS-CoV-2 and the herd immunity threshold in Maranhão. Rev. saúde pública [Internet]. 2020 Dec. 12 [cited 2024 May 2];54:131. Available from: https://www.revistas.usp.br/rsp/article/view/180638