Yes, I read that PMR has the highest rate in Norway and other parts of Scandinavia so that points to a genetic susceptibility. I then did a DNA test with ancestry.com and found that I have Norwegian, Danish and Swedish DNA. Not the majority but they also do a chromosome painter that shows where each origin sits. I can’t yet decipher the chromosome map but given I have 17% of my DNA from Scandinavia and the fact my mother had PMR too, makes me think that all I needed was a trigger. I still don’t know if it was vaccinations - I had the Zoster, COVID booster and flu - in the previous two weeks. I rarely get sick so I have a strong immune system already and the vaccines could have tipped me over the top. When I was a child my mother got tuberculosis and each year they did a Mantoux test on me. The idea was to get a positive reaction. After three years I didn’t and they said it was likely I would never get TB yet my father and brother Had positive responses. I react quite alarmingly to bites from insects. Sorry for the rave but I’m trying to understand immune responses - environmental and genetic. I hope my daughter doesn’t get this as she has inherited the 5% Norwegian but none of the other DNA, which came from my fathers side. FYI photo of part of the story