1st shot, barely noticed anything, staying busy was easy.
2nd (moderna's) shot, well sort of like a curtain of legarthy closed in, but no overt pain symptoms, so I took 3 senior naps that day (now @ 70) and felt great by the next day, meaning whatever brain drain was going on went away. (but don't ask Mz. Boss of her assesment on that). That was over a month ago now.
Too bad younger grandkids don't have a preventative tool yet, but given some time... and faith in modern medicine, which seems to have escape some, we can all be good, and possibly be more prepared for the next viral variant whatever that will be.