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[–] tex 1 point 0 points (+1|-1) ago 

Unnecessarily. They used fetal tissue unnecessarily. Try to keep up.

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[–] CaptOblivious [S] 2 points -1 points (+1|-2) ago  (edited ago)

No. not unnecessarily. It was developed in the 1950's. Stop trying to re-write history, it only makes you look foolish.

https://en.wikipedia.org/wiki/Polio_vaccine