Reading today where the Moderna and Pfizer vaccines require substantial cold for storage.
NPR Article HERE
Pfizer requires storing in a special container using trays to hold the doses at -70C
Dry ice is used, and requires topping off every 5 days, total time before last opening for use is 15 days. It can only be opened twice a day for 1 minute each time round. Removed doses last 5 more days under normal refrigeration.
Moderna needs to be cooled to -20C
using already-developed common containers cooled with dry ice, can be stored six months, removed doses can be refirgerated for 30 days, and thawed to room temperature is good for 12 hours more.
All this is really going to screw with distribution and use
but they say there is no other way to do it using the mRNA type vaccines. Moderna says to expect 90% effectiveness and Pfizer says 95%, both will be used here in the US and which is available to each person will likely be decided based on location due to the distribution issues.
Phil