Lazo, M.J. and Cezaro, A.D. 2021. Why Can We Observe a Plateau Even in an Out of Control Epidemic Outbreak? A SEIR Model With the Interaction of n Distinct Populations for Covid-19 in Brazil. Trends in Computational and Applied Mathematics. 22, 1 (Apr. 2021), 109–123. DOI:https://doi.org/10.5540/tcam.2021.022.01.00109.