I'm trying to understand how mRNA propagates or not throughout the body. We have been lead to believe the vaccine's mRNA protein coder permeates every cell in the body eventually, but explanations of mRNA technology do NOT support this, instead they appear to say that only the small localized muscle cells at the injection site will absorb the vaccine mRNA, which will encode and produce its protein on the surface of those cells only. Passing immune system cells will recognize this protein and prepare to acknowledge it as foreign. The minor reactions to the initial shots are the mild immune system response. Is this how it works? I cannot find a single article that explains this satisfactorily.