$ cat ./records/vaccine-derived-polio-cases-outnumber-wild-polio-complicating-the-2020.txt
Vaccine-Derived Polio Cases Outnumber Wild Polio, Complicating the Gates-Backed Eradication Drive
[RECORD.TXT] · cat --full
By 2020 a paradox confronted the global polio campaign that the Gates Foundation has funded more heavily than almost any other donor: outbreaks of vaccine-derived poliovirus had grown to paralyze more children than the wild virus. The inexpensive oral polio vaccine contains a live, weakened virus that, in under-immunized communities, can spread and mutate back into a paralyzing form; outbreaks across roughly two dozen countries paralyzed more than 500 children in 2020. The same year, Africa was certified free of wild poliovirus — a milestone credited in large part to Gates-backed efforts — even as vaccine-derived cases surged. The foundation has since helped fund a genetically more stable oral vaccine (nOPV2) intended to reduce the risk.
Source: https://www.science.org/content/article/africa-battles-out-of-control-polio-outbreaks
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