Smallpox eradication (1980)
A World Health Organization campaign vaccinated and traced cases across dozens of countries. The last natural case appeared in Somalia in 1977. In 1980 the World Health Assembly declared smallpox eradicated, the only human disease ever eliminated.
A disease that killed an estimated 300 million people in the 20th century stopped spreading.
It set the template for coordinated, well-funded global health campaigns.
It shows what sustained money and political will can achieve against a disease. UNAIDS is betting the same model can end AIDS.
