The new RNA viru... sorry vaccine is:
‘a novel lipid nanoparticle (LNP)-encapsulated mRNA-based vaccine that encodes for a full-length, prefusion stabilized spike (S) protein of SARS-CoV-2.’
So it’s got a little protective bubble around some devious viral code designed to insert itself into your DNA and reproduce. It’s a fucking virus.
You are being infected with a man made virus. Maybe... Maybe, it was made by a demon. Either way, good luck with that one. https://clinicaltrials.gov/ct2/show/NCT04283461

So, assuming I understand the virology and microbiology here (and it's entirely possible that I don't), the SARS CoV-2 S protein is part of the machinery the virus uses to penetrate cells in the respiratory tract. Specifically this S protein has affinity for the human ACE2 receptor.
So it seems to me that creating an antibody to the SARS S protein might, in some way, inadvertently impact either the ACE2 receptor or those molecules that are legitimately attempting to use the ACE2 receptor - after all that receptor isn't just sitting there waiting for a coronavirus to bind it, it actually *does* something for the proper functioning of the organism.....
In other words: it seems like a bad idea to get the immune system to produce antibodies to either an ACE2 receptor or molecules that might legitimately be binding an ACE2 receptor.