Our World in Data on Twitter: "Over the last few decades the world has made great progress toward eradicating polio. But in the last few years we have been set back. To
![Environmental Monitoring Will Be Key as World Reaches Global Polio Eradication | News Center | University of Michigan School of Public Health Environmental Monitoring Will Be Key as World Reaches Global Polio Eradication | News Center | University of Michigan School of Public Health](https://sph.umich.edu/news/2018posts/images/polio.jpg)
Environmental Monitoring Will Be Key as World Reaches Global Polio Eradication | News Center | University of Michigan School of Public Health
![The world is zeroing in on the end of polio — by stopping people at bus stops, airports and train stations | The Star The world is zeroing in on the end of polio — by stopping people at bus stops, airports and train stations | The Star](https://images.thestar.com/CKMQ_znqtGib1yf-oZla4zA2668=/1200x674/smart/filters:cb(2700061000):format(webp)/https://www.thestar.com/content/dam/thestar/news/insight/2018/02/17/the-world-is-zeroing-in-on-the-end-of-polio-by-stopping-people-at-bus-stops-airports-and-train-stations/polio_world_map_web_jpg.jpg)
The world is zeroing in on the end of polio — by stopping people at bus stops, airports and train stations | The Star
![Risk factors for the spread of vaccine-derived type 2 polioviruses after global withdrawal of trivalent oral poliovirus vaccine and the effects of outbreak responses with monovalent vaccine: a retrospective analysis of surveillance Risk factors for the spread of vaccine-derived type 2 polioviruses after global withdrawal of trivalent oral poliovirus vaccine and the effects of outbreak responses with monovalent vaccine: a retrospective analysis of surveillance](https://www.thelancet.com/cms/asset/8ac99bb3-73c7-42e4-90c6-40d923e9d4d4/gr1.jpg)
Risk factors for the spread of vaccine-derived type 2 polioviruses after global withdrawal of trivalent oral poliovirus vaccine and the effects of outbreak responses with monovalent vaccine: a retrospective analysis of surveillance
![Evolving epidemiology of poliovirus serotype 2 following withdrawal of the serotype 2 oral poliovirus vaccine | Science Evolving epidemiology of poliovirus serotype 2 following withdrawal of the serotype 2 oral poliovirus vaccine | Science](https://www.science.org/cms/10.1126/science.aba1238/asset/3316c3c1-788c-4157-9c9d-77f6ff39c048/assets/graphic/368_401_f1.jpeg)