Tag: <span>Vaccine-derived polio</span>

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Vaccine-derived polio is undermining the fight to eradicate the virus
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Vaccine-derived polio is undermining the fight to eradicate the virus

Wild polio has almost been eradicated, but vaccine-derived strains retain the potential to paralyse. Better vaccines have arrived — but they are only part of the answer. The nOPV2 polio vaccine has been administered to more than 650 million children across 30 countries.Credit: Issouf Sanogo/AFP/Getty When smallpox was declared eradicated in 1980, there were hopes...