I did some research on this in my spare time. It's about as likely as the long term side effects of the covid19 itself(unknown), but to a lesser extent. If we t

I did some research on this in my spare time. It's about as likely as the long term side effects of the covid19 itself(unknown), but to a lesser extent. If we take the Flu vaccine for example, it causes some autoimmune disease at rate 15 times less than the actual Flu virus. Flu vaccines are the most tested. There are nastier less tested vaccines out there that score worse, but still better than the actual viruses. That being said a virus doesn't infect the whole population in general, while for a vaccine to be effective you have to push it out widely thus reversing the win a little bit. I am sure there is an equation out there that balances the risk.