Has anyone looked at whether the mental stress or anxiety induced by putting someone through the process of getting the shot could be maybe be a reason for triggering this? Not the vaccine itself, but the whole routine of line up, answer questions about allergies and other risk factors, then waiting to get the shot, then having to sit there waiting for symptoms to show up... Not to mention people don't like needles either.

I can imagine the heart rate during this ordeal is way higher than normal and could trigger inflammation.

Not saying that the science here is invalid, just actually curious to know how this gets ruled out.