I am fairly confident my PMR was triggered by my last Covid booster. I received it in May 2023 and started with PMR symptoms a month later. Before then, I had never had any trouble at all with my joints or muscles. I was fit, active, and pain-free. I am seeing more and more indications that PMR might be connected with either having Covid or receiving the vaccine. When I asked my doctor about it at the time, he said it was a possibility, but that it would take another few years for the evidence to become clear, since both the disease and the vaccine are still relatively new. I haven't had another vaccine since being diagnosed with PMR, since I'm trying to taper off the prednisone and don't want to rock the boat. I am not against vaccines in any way -- they save lives -- but over-vaccination can become a problem. I'd had six Covid vaccines between 2021 and 2023, which I now feel was probably overkill and ended up sending my immune system over the edge.