Earlier quoted context omitted.
The very TLDR response to this is that MRNA is temporary and not self-replicating. Within a few hours of being administered, all the MRNA in the vaccine has been broken down by the body into amino acids. MRNA can't mutate because it doesn't replicate. It just produces proteins.
Thank You, that is what I needed to hear and it sounds reasonable, what sort of proteins does it produce? Just the spiked ones or longer strands like DNA? Could You also offer up another TL;DR answer as to why the booster seems to present significantly more side effects? Thanks
As every medical expert has been saying for months now, the vaccine doesn't effect your DNA.
The immune response is what causes the side effects, and the immune response is stronger with the second dose (this follows intuitively from immunity being more robust after 2 doses).