Welcome @dam67, Sorry to hear your husband has been diagnosed with PMR. I've had 2 occurrences of PMR but it is currently in remission. I've had both Pfizer vaccines and the booster without making my PMR flare up again. I would talk with his rheumatologist or doctor to see if there are any other considerations. It is a lot to worry when you read a lot of negative experiences and no positive ones. People with PMR who've had the vaccine and no bad side effects don't usually post about it. I'm not a medical professional so it's just my opinion.

PMR is a new world for you when you first are diagnosed. There are definitely things you can do to help with the diagnosis. Here are just a few of the PMR discussions you might find helpful for learning more about PMR:

-- PMR Dosages and Managing Symptoms:
https://connect.mayoclinic.org/discussion/pmr-dosages/
-- PMR Diet: Foods to eat and avoid:
https://connect.mayoclinic.org/discussion/diet-and-pmr/
Here is an article that you may find helpful. 3 Strategies for Coping with Polymyalgia Rheumatica (PMR): https://www.arthritis-health.com/blog/3-strategies-coping-polymyalgia-rheumatica-pmr

Are you able to discuss your concerns with your husbands rheumatologist or doctor?