Global Eradication Achieved (Certified by WHO in 1980)
Global Smallpox Cases (1950–1980)
Eradication Timeline
Edward Jenner developed the cowpox vaccine, creating the world's first successful vaccine.
Global intensified eradication initiative launched using bifurcated needles and ring vaccination.
Ali Maow Maalin in Somalia was the last person infected with naturally occurring Variola minor.
33rd World Health Assembly officially declared the world free of smallpox.
Key Insights
Lives Saved
Smallpox killed an estimated 300–500 million people in the 20th century alone. Its eradication saves roughly 5 million lives every single year.
Economic ROI
The entire global eradication effort cost ~$300 million USD, saving the world over $1 billion annually in treatment and containment costs forever.
Ring Vaccination Method
Instead of mass universal vaccination, epidemiologists isolated infected individuals and vaccinated everyone in their immediate contact perimeter.