Hi, I wanted to join this conversation because I am very sure the Afluria Flu shot caused a case of PMR in my body. I had the shot on October 23, 2020 as well. The next day I had high fever and a bout of total body myalgia - had to be laying down for relief. Stiffness like i have never had before. The myalgia focused in my arms (upper body) and my back buttocks and back thighs to my knees. It eased up after a couple of days, but the aching in my arms and legs stayed at a lower level. Then within 30 days it came on with vengeance - I could not raise my arms above my shoulders (weakness and pain) and my butt to the backs of my knees were the same. When I stood, I could not move for a second and then when I did it was painful and my legs felt week even though I knew I as in good shape (daily exerciser). I finally went to my general doctor after taking lots of ibuprofen and tylenol. He put me on prednisone and within two days, I was feeling much better. I stayed on prednisone for almost 4 months ( he had to wean me off slowly). The pain and weakness are all gone now, but I was very afraid of the Covid vaccine thinking it would do the same. It didn't thankfully. I just wanted to say this happened to me and I know in my heart it was the Flu vaccine. My doctor hesitated to say it was PMR because he said I was too young (i was 56 at the time), but he said if the prednisone knocked it out, he would be more wiling to say it was a good possibility.