Why Does the COVID-19 Vaccine Have to Be Kept So Cold?
More than two million doses of the two new vaccines against COVID-19 have been put in people's arms since December 14. But racing the shots to the frontline health care workers hasn't been an easy feat—the Pfizer-BioNTech vaccine specifically must be stored at subzero temperatures, creating a logistical puzzle of dry ice and specialized freezers. And while the Moderna vaccine remains stable at slightly balmier temperatures, it too must stay […]
