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What it could take to deliver a Covid-19 vaccine to the world
November 12 2020, 08:00
An approved vaccine for Covid-19 could be forthcoming, after the Pfizer/BioNTech vaccine candidate was reported to be more than 90% effective in preventing infection in volunteers. However, the next steps could be just as challenging. CNN's Anna Stewart reports on how global companies are preparing for storing, transporting and distributing millions of doses.