Biological, social, and healthcare factors associated with death due to influenza A(H1N1) during the 2009 epidemic in Brazil. SciELO Preprints, 2023. DOI: 10.1590/SciELOPreprints.6696. Disponível em: https://preprints.scielo.org/index.php/scielo/preprint/view/6696. Acesso em: 12 jun. 2026.