Haven’t gotten the new vaccine yet, but my first moderna gave me some chills, headache, and fatigue, I didn’t check my temperature but I wouldn’t have been surprised if I had a slight fever. It hit me maybe 8-12 ish hours after I got it, not too bad, but not exactly fun either, could have worked through it if I needed to but I was glad I had the day off. The real kicker for me though was I work night shift, I got it right after work in the morning, went home, went to bed, and it started hitting me a bit after I got up the next evening, and by the time I was ready to go to sleep the next morning I was feeling fine. If I’d been on a normal schedule and got the vaccine at the same time, I probably would have been going to bed at about the same time it hit me and I would have slept through all of the symptoms.
Most of my boosters have been moderna, and I haven’t had any issues with them besides a sore arm, so I think the first dose was my immune system going “hey wait, what the fuck is this? We got a code red over here” And with the boosters it pretty much just went “oh, ok, another one of these, go ahead and put it with the others, no biggie”
The one Pfizer vaccine I did get didn’t seem to make my arm quite as sore as the others. So that’s something I guess.