No reaction to the vaccine or booster for me except feeling groggy for a day or so after the first shot. I had Covid two weeks before Christmas and it wreaked havoc on my GI tract. I had a routine checkup with my surgeon last week and when I told him this he wasn't surprised to hear it. He said GI symptoms with Covid can be terrible on those without a colon. It's been about a week since I've gotten back to somewhat normal.