Patients account, medical history and differential diagnosis. The same way you diagnose chronic fatigue syndrome. As someone with personal experience, *chronic

Patients account, medical history and differential diagnosis. The same way you diagnose chronic fatigue syndrome. As someone with personal experience, *chronic* fatigue is difficult to measure, especially if it’s getting gradually worse, but routine tests like blood tests and ECG; especially under physical stress can measure degradation or improvements. I personally cannot do my work commute without being absolutely knackered for hours, and sweating like hell - since I had covid.