Autoimmune disease could have been kicked started by vaccine or covid. The person needs the full work up..not just half assed. For example..extended myositis panel not just myositis panel.
I have really had to push hard to get testing..and in some cases I just paid for it myself through places where you could order lab tests yourself.
First rheum. Dr. missed but I pushed hard with second Dr and he found things first one missed. Also there is a mmp9 test that they don’t think to order.
Btw... Whenever i hear muscle deterioration I think to be sure to be checked for antisynthetase syndrome
There is a faulty gene that can make you susceptible. Il1b.
NhS is studying myositis and what factors trigger it.