OPV caused 491,000 cases of paralysis in India
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6121585/
https://www.npr.org/sections/goatsandsoda/2017/06/28/534403083/mutant-strains-of-polio-vaccine-now-cause-more-paralysis-than-wild-polio
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OPV caused 491,000 cases of paralysis in India
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6121585/
https://www.npr.org/sections/goatsandsoda/2017/06/28/534403083/mutant-strains-of-polio-vaccine-now-cause-more-paralysis-than-wild-polio