That's Another Autoimmune Condition.

Where the immune system decides, for some reason, that the nervous system is the enemy. So attacks it.

https://www.rt.com/news/529081-europe-covid19-johnson-vaccine-ema/

If you're prone to it then it can be triggered by any form of infection. Including COVID-19.

It shows how safety orientated the medical profession is. That they're working to make sure everyone is looking out for that very small risk.