The polio vaccination programme has successfully reduced the prevalence of polio cases by 99.9% worldwide since it was launched in 1988. This journey has faced its fair share of challenges, and it seems that the last mile to realising the dream of a polio-free world is going to be equally challenging.
The U.S., the U.K., and Israel, among others, recently reported polio cases in unvaccinated people after having been polio-free for more than a decade. They have also reported a silent and widespread transmission of polioviruses, going by wastewater surveillance.
