Ferreira, A.L. and Araujo, K.B.G. 2023. Stability of the Epidemiological Model SIR with Loss of Immunity. Semina: Ciências Exatas e Tecnológicas. 44, (Sep. 2023), e47860. DOI:https://doi.org/10.5433/1679-0375.2023.v44.47860.