re: #51 Jack Burton in Mactified Forshion
Not sure about the Pfizer/Biontech shot, but every single person I know, myself included, that had the Moderna vaccine, including people who felt no effects at all from the first two shots, were knocked on their ass for a day or two from the booster.
I’ve heard that the booster gets you back up to 95% protection in about 2 days instead of 2 weeks and this might be why people are feeling like ass for a couple of days after. Probably a greater immune response, but I’m not a doctor by any means.
I got the Moderna booster, and felt slightly nauseous the next morning, then I was fine.