The great question for chronic fatigue syndrome and long COVID is: what causes post-exertional malaise (PEM)? The latest study to come out of Nancy Klimas’s Institute for Neuroimmune Medicine – led by Lubov Nathanson (senior author) and directed by Derek J. Van Booven (lead author) – defines PEM as “as … Continue reading Exercise Triggers Major Immune System Letdown in ME/CFS