Maybe it's not in all the vials?
Maybe the dosage varies for various batches?
Maybe some people have enough glutathione to handle it?
Maybe some anti-vaxer sabotaged the experiment?
Or maybe .....
Maybe, maybe, maybe is not an explanation for why the MAJORITY of people do not have those reactions.
If it were “system” to the vaccines’ formula, MOST people would be having those reactions, but that is not the case.
I think greater study will find (a) genetic reasons, and/or (b) reasons related to preexisting medical conditions, and (a) or (b) related to the spike protein itself whether from the virus or the vaccine.