/u/[deleted]'s posts in /r/AskHistorians
How did slaves who escaped captivity via the Underground Railroad initially get in contact with the UR's conductors?
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In 2014, researchers in Kenya discovered large numbers of vaccine vials laced with human chorionic gonadotropin (hCG), a fertility-suppressing compound. Have there been other incidents like this before? What is the history of questionable vaccination campaigns in developing countries?
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