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Vaccine rollouts have always been fraught. Sam Kean tells the story of the Balmis expedition, which brought the smallpox vaccine to the Americas.
Learn more about your ad choices. Visit megaphone.fm/adchoices
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Vaccine rollouts have always been fraught. Sam Kean tells the story of the Balmis expedition, which brought the smallpox vaccine to the Americas.
Learn more about your ad choices. Visit megaphone.fm/adchoices