The attenuated polio vax does carry a small risk of actually causing illness - is why US switched to IPV vax. https://twitter.com/bodhibrian/status/722998196025221120 …
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@bodhibrian@kath2cats@VaccineUK Through them methodically, rating them on a transparent scale. They then take the studies that score 2) -
@bodhibrian@kath2cats@VaccineUK Highest and review their results, coming up with the best possible evidence, taken from ALL studies 3) - Show replies
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