The side effects seem to be all over from basically nothing to wiped out for -2+ days.
Some have problems with the first shot and some with the second.
Sleeping during the day after a shot seems to be a major side effect for the women in our family. It lasts for one day, and then they are over it.
Most of my family got Moderna, no reaction, I didnt want Moderna so am still waiting..I prefer Phiser..everyone is different..my brother and his wife got pfiser, no side effects from 1st dose, in two weeks they get their 2nd so will see what happens..my Mom, zero side effects other than arm pain but for my sister, she is better the fever dropped to 99.5, she never took anything for it the highest was 100.3 which was not an issue for her she just felt achy all over, still does maybe a little less