A prior open label study has shown that transcutaneous vagus nerve stimulation [tVNS] can improve the health of some patients with postacute sequelae of SARS-CoV-2 infection (PASC), severely affected enough to also fulfill criteria for myalgic encephalomyelitis / chr...

The purpose of this study is to examine cardiopulmonary function in Chronic Fatigue Syndrome (CFS) patients and determine how it relates to the common symptom of Post-exertional malaise (PEM). Subjects will complete a maximal exercise test on 2 subsequent days. Tota...