Smallpox is the only human disease ever eradicated
A virus that killed for millennia was wiped from the wild by a global vaccination campaign — and has never come back.
For thousands of years smallpox was one of humanity’s deadliest diseases. Then, in 1967, the World Health Organization launched an intensified campaign built on tracking outbreaks and “ring vaccination” — isolating each case and immunizing everyone around it.
The last cases came down to a handful of named people. In 1975, three-year-old Rahima Banu of Bangladesh was the last person in the world to catch the deadlier form, Variola major, naturally. Two years later, a hospital cook named Ali Maow Maalin in Somalia became the last natural case of any kind. Banu, gravely ill with the major form, survived; Maalin, who caught the milder Variola minor, recovered after a search of his village turned up no further cases. After two years of careful surveillance, a global commission certified the disease gone on 9 December 1979, and the World Health Assembly declared the world free of smallpox on 8 May 1980.
“The world and all its peoples have won freedom from smallpox,” the World Health Assembly declared in 1980.
Yet the true last death came not in the wild but in a lab. In 1978, Janet Parker, a medical photographer at the University of Birmingham, was infected by virus escaping a research lab below her office and died — a grim coda that hardened the case for tighter controls. Today only two facilities are sanctioned to hold the live virus: the CDC in Atlanta and Russia’s VECTOR institute. Whether to finally destroy those last stocks is still debated, decades on — a reluctance to erase the very thing humanity worked so hard to defeat.
It remains the only human disease ever eradicated, helped by one key fact: the virus lived only in people, with no animal reservoir to hide in.
Sources & references
3 referencesWell-established. Corroborated by 3 independent sources.
