Global smallpox eradication certified (1980)
The World Health Assembly formally declared smallpox eradicated on May 8, 1980, three years after the last naturally occurring case was found in Ali Maow Maalin, a hospital cook in Merca, Somalia, in October 1977. A Global Commission of scientists from 19 nations certified the eradication in December 1979 after intensive country-by-country verification.
Routine smallpox vaccination ceased worldwide, saving billions of dollars annually and ending a disease that had killed an estimated 300 million people in the twentieth century alone.
Smallpox remains the only human disease ever fully eradicated. It established the model of independent expert commissions verifying country-by-country elimination that WHO now uses for the EMTCT initiative.
WHO's EMTCT validation process directly descends from the smallpox eradication verification model: independent expert committees, standardized criteria, and country-by-country certification. The difference is that EMTCT elimination must be continuously maintained rather than achieved once, making each validation an ongoing commitment rather than a permanent victory.