Tognotti, Eugenia. “The Eradication of Smallpox, a Success Story for Modern Medicine and Public Health: What Lessons for the Future?”. The Journal of Infection in Developing Countries 4, no. 05 (May 15, 2010): 264–266. Accessed March 28, 2024. https://jidc.org/index.php/journal/article/view/20539058.