My wife and I (both Pfizer vaxxed) just developed covid. I was eligible for the infusion therapy and it was well worth it. We basically had minor flu symptons. My brother, who is Mederna vaxxed and a Booster Shot just got Covid as well. Same, minor flu symptoms.
I believe the Vaxxes plyed a big role in keeping the symptoms minor. Before Covid, I would have continued, with the minor symptoms I had, to work except for the one day I had a fever.
The only thing about the infusion therapy is I cannot take the Booster for 90 days.