I received a booster the week of Thanksgiving. No side effects. Sure enough, 10 days later, covid positive (courtesy of my kid, thanks). I had what the CDC defines as a “mild” case but it was the worst sickness that I’ve experienced since 2011 when I had swine influenza. Sore throat, headaches, fever of 102, loss of taste, cough, major congestion. I took 4 days off of work and since I was so congested, I didn’t sleep very well either. Most of the symptoms went away after a few days except the congestion which lingered for over a week. The headaches were the worst. They would just pulsate for hours.
Let me dispel any notion here that you can’t get sick after vaccination or a booster. You can. Obviously everyone has a different reaction to it. If South Africa, the UK, and Europe are previews of what is going to happen here in the US, we are about to get hit with a tidal wave of infections. The good news is that this omicron variant appears to be far less severe even though it is more transmissible.
Stay safe