My PMR started after I got the Pfizer vaccine. I feel that it was triggered by the vaccine and have not gotten any boosters. I asked my rheumatologist his opinion about any relationship between PMR and vaccines. Similar to your rheumatologist, he said the science just doesn't support any connection. His take is that there would have been a large increase in PMR incidence since so many elderly people got the vaccine. I have my doubts, wondering if anyone tracks this, plus I think there are undiagnosed cases and people who were destined to get the disease but the vaccine hastened the onset. I asked him also if he thought I was immune compromised. He said that since I was taking less than 10 mg of prednisone he did not think so. He did not think I needed to be more cautious than the average person about travel, etc.