‘Dr’ Gates in 2020 about mRNA vaccines

"Because RNA vaccines let your body do most of the work, they don’t require much material. That makes them much faster to manufacture. There’s a catch, though: we don’t know for sure yet if RNA is a viable platform for vaccines. Since COVID would be the first RNA vaccine out of the gate, we have to prove both that the platform itself works and that it creates immunity. It’s a bit like building your computer system and your first piece of software at the same time."
"Here’s how an RNA vaccine works: rather than injecting a pathogen’s antigen into your body, you instead give the body the genetic code needed to produce that antigen itself.

When the antigens appear on the outside of your cells, your immune system attacks them—and learns how to defeat future intruders in the process."