They contain approximately the whole vaccine, try looking them up on Wiki.
Perhaps you've misunderstood me. I'm not arguing that all current vaccines against COVID are mRNA vaccines. What I'm saying is that they all rely on antigen recognition.
The spike protein is not the only antigen, there are, for example, nueclocasid proteins which can be targetted, resulting in lysis. Not all spike antibodies are streralising and not all sterilising antibodies target the spike.