You mention the spike protein being shed in the body. The spike protein is injected into the body enclosed in a capsule of nano lipoprotein. That enclosure prevents the immune system from destroying it. This capsule is absorbed by cells on the dendrite cell surface and it travels to the ribosomes. It is there the the RNA undergoes a translation which is broken down into fragments and posted on the surface of the dendrite cell.
T-helper cells, like tracking dogs, visit these cells on the surface. This triggers a process which releases T-cells that are programmed to attack anything that has the unique proteins of the COVID spike protein. This process goes on continuously as the body picks up germs and foreign chemicals. It keeps us alive.
The mRNA causes your cells to produce the spike protein.
That spike protein is recognized both as a toxin your immune system must attack AND as produced by your own body.
This results in an autoimmune response that does attack your own body.
https://covid19.onedaymd.com/2025/04/covid-spike-protein-vs-vaccine-spike.html