mRNA vaccine

We have two great vaccines so far. One has to be kept in a regular freezer; the other in a mega freezer. This is because they contain RNA, which is unstable, not the more-stable DNA. What sense does this make? For the answer, you'll need to navigate The Dreaded Chemistry Lesson From Hell! Enjoy. Hint: It's one lousy oxygen atom.
By any measure, today's announcement about the unexpected efficacy of the Pfizer/BioNTech coronavirus vaccine is great news. But, Pfizer's Dr. Robert Popovian cautions us that the job is not done. There are policies that are essential to ensure the vaccine is promoted to the public, distributed, and administered properly. And be priced so that everyone can get it. Devil. Details.
If Pfizer's coronavirus vaccine is successful, it will be the first-ever mRNA vaccine on the market. How is the vaccine made and how does it work?