Messenger RNA, or mRNA, is the molecule that forms the basis of the coronavirus vaccines made by Moderna and by Pfizer-BioNTech. Although the vaccines went from lab to jab in just a few months, the idea of using mRNA as a therapy has been around for decades. The pioneers of this powerful technology reveal its unexpected path, the obstacles that had to be overcome along the way and its future potential. Tom Standage hosts.

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