Judging by this week's survey of four recent COVID booster recipients, you have a 50% chance of feeling nothing at all other than soreness at the injection site. Two felt no ill effects at all, one ran a fever for 24 hours, and one spent a day watching movies and napping.
@ImagineThat I did flu in right and covid in left on a Friday evening, was run down and had a low-grade fever the next day, slept a lot. Was fine by Sunday evening.
@ImagineThat
I never feel anything from any vaccine *except* the shingles vax. I'd rather feel a little something so at least I'd know my body wasn't ignoring it.