The COVID vaccines have an associated artificial spiked protein. The spiked protein is natural in the body but the artificial one created for the COVID vaccines can cause inflammation everywhere in the body and can trigger things like long term COVID or polymyalgia rheumatica. My PCP said many doctors believe this privately but will not discuss it publicly. I learned about it from an urgent care doctor who spoke totally off the record. He said he has been in the business 25 years and people with multiple symptoms like mine came in about 2 times a year but starting two years ago a flood of them has started.