Skip to main content
Work with the NEU
The bumpy road to polio eradication
After a four-decade worldwide battle with the disease, only Pakistan and Afghanistan now have reported cases of the disease. ROX MIDDLETON, LIAM SHAW and JOEL HELLEWELL explain the science behind driving polio to extinction
The polio vaccine being given orally in India

ERADICATION is the final frontier in suppressing disease. Once truly eradicated, a disease is no longer a threat to people because there are simply no reservoirs of “wild” viruses left to infect anyone. If it were an organism, the virus would be called extinct in the wild. Eradication is extremely ambitious. Only two diseases have ever been globally eradicated by humans — smallpox in 1980 and rinderpest (a disease of cattle) in 2011 — but finally polio is on the brink.

Over the past 40 years, a worldwide public-health campaign has administered billions of doses of oral polio vaccine, bringing the number of cases of wild poliovirus down from about 400,000 cases per year in 1980 to just 33 last year.

In 2018, Pakistan and Afghanistan were the only two countries in the world to report cases. The final stages of eliminating a disease are the hardest and require the most intense effort because stopping the last few infections is crucial to stop the disease bouncing back. Understandably, near-elimination is also the time when people are most likely to take their foot off the gas, because the disease is no longer such a noticeable problem.

The 95th Anniversary Appeal
Support the Morning Star
You have reached the free limit.
Subscribe to continue reading.
Similar stories
People dressed in protective gear lower into a grave the coffin containing the remains of 6-year-old Baudjo Baraka Jules, who died of Ebola, in Bunia, Ituri province, eastern Congo, August 18, 2026
Healthcare / 28 August 2026
28 August 2026

As thousands die in the eastern DRC, a global health emergency is being starved of funds, says S KRISHNASWAMY

People search for gold at a mining site in Iga-Barriere,  Congo
Africa / 19 August 2026
19 August 2026

Poverty, refugee displacement, child labour and militia violence are exacerbating the challenge of health workers to limit this deadly contagious disease. CONSTANT SAME BAGALWA and MARK BANCHEREAU report 

A health worker sprays disinfectant in a freshly dug grave for the body of Jacques Lobo Dhena, who died of Ebola, in Bunia, Ituri province, eastern Congo, August 12, 2026
DR Congo / 13 August 2026
13 August 2026
Health workers in protective gear wave inside an Ebola treatment centre in Bunia, Congo, August 10, 2026
Central Africa / 11 August 2026
11 August 2026