Why So Cold?

One of the biggest challenges of distributing a COVID-19 vaccine: cold storage—and one of the most promising vaccine candidates yet has particularly high maintenance requirements.
 
Pfizer’s vaccine must be kept “colder than winter in Antarctica”: -70 degrees C to be exact, compared to Moderna’s version, which can stay viable at just -20 degrees C.
 
Innovation: Pfizer’s custom “pizza box” packaging can safely store the vaccine for a few weeks without special freezers, using dry ice.
 
Possible: With further testing, Pfizer’s vaccine may prove able to survive in warmer temperatures—and that could be a huge help to distributing it to remote and low-resource areas.
 
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