You can get Long Covid from the vaccine, it is being called vaccine injuries. Quite a number of the people in LongCovid support groups have never had Covid and

You can get Long Covid from the vaccine, it is being called vaccine injuries. Quite a number of the people in LongCovid support groups have never had Covid and yet acquired Long Covid symptoms shortly after taking the vaccine. I acquired subclinical pericarditis from the vaccine booster. It’s the kind of thing doctors can’t detect in either an Echocardiogram or a MRI so it wouldn’t get included in adverse reaction statistics. It hurt like hell but fortunately was quickly resolved with colchicine. The cardiologist I saw said he was seeing a substantial spike in subclinical pericarditis. Regardless of the cause you can test if you have ME/CFS by doing a max exertion test. Do cardio as hard as you can, and if you can’t get close to the same level two days later then you likely have Post Exertional Malaise (PEM) which is defining characteristic of ME/CFS/LongCovid/VaccineInjury.