Epidemiological evolution of COVID-19 in the State of Piauí in 2 months. Research, Society and Development, [S. l.], v. 9, n. 8, p. e384985777, 2020. DOI: 10.33448/rsd-v9i8.5777. Disponível em: https://rsdjournal.org/rsd/article/view/5777. Acesso em: 10 dec. 2025.