@slf202mcinfo. I can trace the onset of PMR to the last in the series of Pfizer vaccines. The symptoms actually started the year before, they were mild, they would come and go, and I couldn’t t connect them to anything. But after I took the last Pfizer booster, all the ‘phantom’ symptoms I’d been experiencing came together, stronger, more painful and debilitating and I was diagnosed PMR. (Jan 2023) I’m lucky my internist knew how to treat it, she started me on a strong dose of Prednisone for about 2 weeks and I tapered successfully from there. I wish you the best of health.