Yes but... no one is dumping anything remotely random here :) It's using existing building mechanism in cells to have it build a specific protein that will bin

Yes but... no one is dumping anything remotely random here :) It's using existing building mechanism in cells to have it build a specific protein that will bind to a specific pathogen. And lot of clinical tests to try to detect if those proteins being built have other effects than instructing the cells to create the antibodies we want. It's roughly the same mechanism at work when you inject disabled pathogen and hoping that the cells will produce the same antibodies, it's just a faster, safer, more precise way to induce it. Heck, it's even the same mechanism that occurs when your cells encounters a wild, random virus, like it may be happening a lot more than you think, and, well, you're still alive :) By the way, you may be thinking under the assumption that the 'program' is the DNA, and that mRNA vaccines is changing it some way or another, which is not, this is not genetic therapy.