How a COVID vaccine might work — and the challenges of distributing it

  • By cvbizz
  • November 9, 2020
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As drug companies around the world rush to develop candidates for coronavirus vaccines, Pfizer announced encouraging early data from its own trials Monday. What do the preliminary results show, and even if they are borne out, what challenges remain with regard to production and distribution of the vaccine? Science correspondent Miles O’ Brien joins William Brangham to discuss.

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