Max exertion test for post exertional malaise (PEM), Immunoassays, red blood cell plasticity in small capillaries, nano-needle salt stress test, calcium channe

Max exertion test for post exertional malaise (PEM), Immunoassays, red blood cell plasticity in small capillaries, nano-needle salt stress test, calcium channel dysfunction test, and there are probably a few more that I’m probably forgetting. These test are all highly accurate and can easily distinguish between those who have ME/CFS/LongCovid and those who don’t. Edit: I did forget some; retina capillary test, ACE-2 auto antibodies (though not sure about the accuracy for this one). Then there is also the metabolic assays that are so full of distinctive differences that the issue is determining the important ones.