Neural Mechanisms of Fatigue in Post-Acute Sequela of SARS-CoV-2

Who May Qualify: - Age 18 to 75 years old. - Have received a clinical diagnosis of post-acute sequelae of SARS-CoV-2 (PASC)/long COVID syndrome using the criteria specified by Thaweethai, et al., 2023 (JAMA). This symptom checklist provides a score based on the number and severity of symptoms. An individual with a score \>12 is classified as having PASC. - Currently experiencing Fatigue/Brain Fog as assessed with the Post-COVID symptom checklist and the PedsQL questionnaire. Who Should NOT Join This Trial: - Neurological disorders including, but not limited to, stroke, head injury, epilepsy, seizures, brain tumors, brain surgery, Parkinson's Disease, or any other neuromuscular disease (self-report). - Diagnosed history of severe psychiatric diseases such as depression and schizophrenia (self-report). - Congestive heart failure. - Peripheral artery disease with claudication. - Cancer. - Pulmonary or renal failure. - Unstable angina. - Uncontrolled hypertension (more than 190/110 mmHg). - Severe aphasia. - Orthopedic or pain conditions. - Have had exposure to metal or metal implants, due to the hazardous effects of the magnetic field. - If on immunomodulatory therapy, they must have been on that therapy for at least 6 months before the start of the study. Healthy age- and sex-matched controls for PASC - Who Should NOT Join This Trial: Participants with a history of any of the following will be excluded from the study: - Hospitalization due to SARS-CoV-2 infection. - Neurological disorders including, but not limited to, stroke, head injury, epilepsy, seizures, brain tumors, brain surgery, Parkinson's Disease, or any other neuromuscular disease (self-report). - Diagnosed history of severe psychiatric diseases such as depression and schizophrenia (self-report). - Congestive heart failure. - Peripheral artery disease with claudication. Always talk to your doctor about whether this trial is right for you.