And with the current vaccines, we keep getting surprises like this:

https://www.cnbc.com/2021/06/23/cdc-reports-m...shots.html

They even admit that Covid causes heart inflammation, so when the vaccine is causing heart inflammation, that should tell you something as well. It's a big concern when the Moderna and Pfizer vaccines are causing the same issues the virus is causing and we have no clue what the long term issues will be.