Autoimmune responses are well known with some vaccines and some conditions, such as GBS. Most real experts know that vaccines carry all sorts of risks. It's the general public that is mostly unaware and would find this sort of thing surprising. It's the whole "safe" vs "generally safe" thing.
GBS is the autoimmune response to many vaccines. In a lot of ways, it's similar to having a stroke in as far as people have to relearn how to do many things, sometimes down to relearning how to walk.
>Most real experts know that vaccines carry all sorts of risks
And that's why all the real experts made sure to properly communicate the risks vs benefits of the Covid vaccine in an age, sex, and dose-stratified fashion, right? Oh wait...
The real experts in the fields I know well don't tend to spend much time communicating with others about their expertise, especially to the layman. Why would the real experts in this particular field be any different?
The high level of insanity of public debate made people shut up. I know at least one immunologist who quit Twitter fairly early on in the pandemic because of it. Doing health communication has hazards of its own.