With all the antivax morons not getting their kids measle shots and the like now, just a matter of time before polio makes a return and iron lungs come back into fashion
well it was eradicated from the USA in 1979 and 1991 for the Western Hemisphere.
Apparently there was a small London outbreak in 2022 due to vaccine like polio virus being detected in sewage samples, which continued to evolve and reacquire paralysis inducing mutations. The likely cause would be someone recently vaccinated with the live virus rather than an inert vaccine.
National incident declared over polio virus findings in London sewage
UK Health Security Agency says evidence of limited community transmission of virus found in wastewater
www.theguardian.com