A COVID-19 vaccine is set to be put forward for emergency approval in the U.S. in a few weeks.

Its developers, Pfizer and BioNTech, said the vaccine could prevent nine out of 10 people from getting COVID-19.

Phase 3 clinical trials still need to be completed and it might take a while to get approval.

But as Emanuela Campanella reports, there’s the potential for a major logistical challenge ahead of us that we need to prepare for: keeping the vaccine at an ultra-cold minus-80 degree.

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