Additionally, the mRNA vaccines express a modified spike protein that is stabilized in its "prefusion" state (as seen on the virus itself before it binds with a cell), and the resulting complex seems to have somewhat fewer effects even when it does interact with a cell.
The mRNA vaccines are designed to express the spike protein in a membrane-bound form; very little is found floating free. See https://www.deplatformdisease.com/blog/spike-protein-circula....
Additionally, the mRNA vaccines express a modified spike protein that is stabilized in its "prefusion" state (as seen on the virus itself before it binds with a cell), and the resulting complex seems to have somewhat fewer effects even when it does interact with a cell.