The Eradication of Smallpox (1958–1980)
The story of the greatest triumph in the history of public health: how a disease that killed some 300 million people in the 20th century alone was hunted to extinction through Cold War-era cooperation, surveillance, and vaccination.
Timeline
The Soviet Proposal
Soviet Deputy Health Minister Viktor Zhdanov proposes a global smallpox eradication campaign to the World Health Assembly, offering Soviet-made vaccine. The USSR had eliminated smallpox by 1936 and argued the only permanent solution to imported outbreaks was worldwide eradication.
Location: Minneapolis, USA (11th World Health Assembly) / Geneva
WHO Adopts the Global Program
The 12th World Health Assembly passes a resolution launching global smallpox eradication. The first years made little progress: funding was thin, endemic countries were left to their own devices, and an estimated 10 to 15 million cases a year continued into the mid-1960s.
Location: Geneva, Switzerland
Henderson and the Intensified Program
After a contentious vote, the World Health Assembly approves a special budget for an Intensified Smallpox Eradication Program. American physician Donald Henderson of the CDC is appointed to lead it, beginning in 1967, with a 10-year target and a WHO smallpox unit in Geneva.
Location: Geneva, Switzerland
A Better Needle and a Cheaper Dose
The program adopts the bifurcated needle, a simple two-pronged instrument holding a droplet of vaccine between its prongs. It required a quarter of the vaccine dose, needed minimal training to use, and cut the cost of protecting one person from roughly 80 cents to as little as 2 cents.
From Mass Vaccination to Surveillance-Containment
Field teams led by Henderson, Nigerian vaccinator William Foege, and colleagues shift strategy: instead of blanket vaccination of entire populations, they track every outbreak and ring-vaccinate contacts around each case. The surveillance-containment approach proves decisive, though many officials resisted abandoning the mass-vaccination orthodoxy.
West Africa Cleared
A CDC-directed campaign across 20 West and Central African countries, backed by U.S. Agency for International Development funding, interrupts smallpox transmission in the region within about two and a half years — far faster than projected and years ahead of schedule. Brazil records its last case in 1971 and Indonesia in 1972.
Location: West and Central Africa
South Asia's Last Great Outbreaks
After the catastrophic 1974 Bihar outbreak, India mounts a national search that leads to a reward system for reporting cases. Smallpox transmission in Asia ends in 1975: three-year-old Rahima Banu of Bhola Island, Bangladesh, becomes the last person on Earth infected with variola major, the deadliest form.
Location: India and Bangladesh
The Last Natural Case
Hospital cook Ali Maow Maalin, 23, contracts variola minor and survives — the last person to naturally contract smallpox. A WHO team and local volunteers conduct a nine-person search and ring vaccination of his district to extinguish the final chain of transmission on Earth.
Location: Merca, Somalia
The Birmingham Laboratory Accident
Medical photographer Janet Parker contracts smallpox from a university research laboratory studying the virus against regulations, and dies — the last smallpox death. The accident, which also claimed her mother's supervisor, sparks debate over the safety of research stocks that continues to this day.
Location: Birmingham, England
The Declaration of Eradication
The 33rd World Health Assembly formally declares that "the world and all its peoples have won freedom from smallpox" — the first, and so far only, human disease eradicated by deliberate effort. A disease that killed 300 million people in the 20th century is gone, with global cooperation between Cold War rivals as its unlikely engine.
Location: Geneva, Switzerland
The Debate Over the Remaining Virus
With eradication achieved, WHO member states repeatedly debate destroying the last known official virus stocks, held at the CDC in Atlanta and Russia's VECTOR institute. Defenders of retention cite research and countermeasure development; critics call the stocks an unnecessary risk. Destruction has been deferred repeatedly, and the dispute remains unresolved.
Location: Geneva, Switzerland