Got mine (Moderna) on Tuesday. Very mild systemic side effects (slight malaise) that didn't affect my ability to do anything.

Extremely sore arm, just like with the last booster. I'm prone to this with vaccines.

However, I DID get the arm rash I got with shots one and two but *not* with shot three. I am assuming this is my system reacting to the Omicron component.

Overall, my side effects were much the same as they have been with the mRNA shots, which I think definitely supports the decision to go without human trials, which would have likely put us behind the vaccine curve again.

My husband, who is over 50, is waiting a couple of weeks until it is four months since his extra booster. I've heard some expects say six, but with it being a new formulation and the fall we didn't want to wait that long.