In the 20th century a lot of medical discoveries were made. Which, in your opinion, helped the world the most and why?

  • SiyahGuraag
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    11 year ago

    Well, Yeah, there has to be many contenders. P.S. I think you were replying to other comment, not to mine? Or were you?

    • @FinalBoy1975OP
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      21 year ago

      Ha! Yes, I was replying to the other comment. Whoops. Sorry!