Leprosy is one of the oldest recorded diseases in human history.
For millennia, it was among the most feared. The physical disfigurement it caused, the way it slowly destroyed nerves, skin, and extremities — and the social stigma that came with it — made leprosy not just a medical condition, but a sentence. Communities built entire systems of exclusion around it. Patients were isolated, sometimes for life.
On March 4, 2026, the World Health Organization announced that Chile has eliminated it.
Not reduced. Not managed. Eliminated — officially verified by WHO as the first country in the Americas to achieve this milestone, and only the second country in the world.
The disease has deep roots in Chile. Leprosy was historically recorded there at the end of the 19th century, centred primarily on Rapa Nui (Easter Island), where a contained programme of treatment and, for a time, isolation managed the outbreak. On the Chilean mainland, cases were always sporadic. The last locally acquired case anywhere in Chile was detected in 1993.
What makes this achievement notable is what came after that last case. It would have been easy to declare victory and move on — to quietly deprioritise a disease that no longer seemed to be spreading. Instead, Chile kept leprosy on its public health agenda. It remained a notifiable condition. Surveillance continued. Clinical readiness was maintained. For thirty-three years, the country watched and waited, making sure the disease didn't come back.
That sustained vigilance is precisely what WHO's verification process rewards.
'This landmark public health achievement is a powerful testament to what leadership, science, and solidarity can accomplish,' said WHO Director-General Dr Tedros Adhanom Ghebreyesus. 'Chile's elimination of leprosy sends a clear message to the world: with sustained commitment, inclusive health services, integrated public health strategies, early detection and universal access to care, we can consign ancient diseases to history.'
PAHO Director Dr Jarbas Barbosa added: 'Being the first country in the Americas to be confirmed as eliminating leprosy sends a powerful message to the Region — that diseases strongly linked to groups living in vulnerable conditions can be eliminated, contributing to interrupt the vicious circle between disease and poverty.'
There are still approximately 180,000 new leprosy cases recorded globally every year, primarily in India, Brazil, and Indonesia. The work is far from done. But Chile's verification is a proof of concept — and an invitation. It shows that with strong health systems, universal access to care, and the political will to stay the course even when the threat seems distant, ancient diseases can be beaten.
One country down. The rest of history to go. 🌎