Smallpox is one of the oldest identifiable diseases of man as well as the first that was successfully eradicated by concerted human effort. The following timeline illustrates the major milestones in the history of this once frightful but now nonexistent scourge.
Bernhardt M. Etiology of Variola and Vaccines. JAMA Dermatol. 2014;150(3):237. doi:10.1001/jamadermatol.2013.8189