[rocha]

Take a look at how mRNA vaccines work, and how they came to be. It is still mind-blowing to me.

[ksk]

Its a fairly old concept, but we're still not at the stage where it can be used in a product for human use. I work in vaccine r&d (though not as a scientist) and there are many technologies that sound great on paper, but haven't been shown to work in the real world.