GoofGoof
Premium Member
The deep freeze is for shipping and storage. For Pfizer the pre-diluted vaccine can stay in a standard refrigerator for 5 days before spoiling and for Moderna up to 30 days. When getting ready to use the vaccines are diluted on site and used within 6 hours. For Pfizer each vial of shipped frozen vaccine is diluted to create 5 usable vaccinations.Was the actual injection extremely cold and, if so, did it cause discomfort while being injected? That's the first thing I thought of when I heard how cold the vaccine needed to be kept in shipment.
Here’s some more details on the temperature requirements:

The COVID Cold Chain: How a Vaccine Will Get to You
A vaccine logistics expert explains how millions of frozen vials will be widely distributed

Why Does Pfizer's COVID-19 Vaccine Need To Be Kept Colder Than Antarctica?
One of the two leading vaccine candidates requires deep, deep freezing. Here's how communities are working to solve for this and how the new Moderna vaccine could help.
