Can PMR (Polymyalgia Rheumatica) be induced by vaccine?

Yes, but not after a flu shot (I haven't had one in years). After I came down with Covid in February, 2020 I was very sick for 2 months, and was never a 100% after that. By June, 2020, I woke up one morning with a very strong taste of salt in my mouth which never went away. Three and a half years later I was diagnosed with PMR. I experiencing Anaphalactic symptoms whenever I had any salt (which is in most of our foods), and was given an epie pen (that was only one of many symptoms that I experienced; the pain was horrific from the PMR). I then had the Covid vaccine which made me extremely sick. However, once I was diagnosed, treated for the PMR, and I was able to come off of the Prednisone a year later, all of my symptoms from the PMR went away. I feel blessed that I was able to get this point, and hopefully by the good grace of God I will stay this way for a very, very long time.