The storage requirements for the Moderna and Pfizer shots are heavily on the safe side. They went with it for the EUA because there was simply no time to prove that it could be safely stored at normal temps. The overwhelming consensus, however, is that it can be. I suspect the full FDA approval will change the guidelines to allow normal refrigeration up to 30 days.
lokedhs|4 years ago
https://www.hsa.gov.sg/announcements/press-release/pfizervac...