OSTERHOLM, Michael T. An Unfortunate Need to Revisit Smallpox Preparedness. Global Biosecurity, [S. l.], v. 1, n. 1, 2019. DOI: 10.31646/gbio.25. Disponível em: https://jglobalbiosecurity.com/index.php/up-j-gb/article/view/25. Acesso em: 19 oct. 2025.