Yes, people can have longterm pain (eg. headache) after the injections and without geting infected (which is one of the common long covid symptoms).
I guess it can't be answered by this study, given that it only studied peope with COVID-19.
actually the opposite is true. Friends of mine are dead, some others with multiple heart attacks, some unable to work.
But people flag my comment because they dont want to hear how they were duped - rather than getting angry about it.
Oct 2020: https://www.bbc.com/news/health-54296223
It was absolutely a thing before the vaccines. It started on social media and took a lot of pushing before doctors and researchers started looking at it.