Epidemiological and spatial analysis of COVID-19 in the State of Piauí. Research, Society and Development, [S. l.], v. 10, n. 5, p. e55010515313, 2021. DOI: 10.33448/rsd-v10i5.15313. Disponível em: https://rsdjournal.org/rsd/article/view/15313. Acesso em: 6 dec. 2025.