Is the SARS-COV2 mortality rate coefficient decreasing over time?. SciELO Preprints, 2020. DOI: 10.1590/SciELOPreprints.1093. Disponível em: https://preprints.scielo.org/index.php/scielo/preprint/view/1093. Acesso em: 18 maio. 2026.