Brain fog. Fatigue. Sleep problems. These symptoms plague many people with “long COVID” for weeks or months after recovering from COVID-19. But these symptoms are also remarkably similar to those of another disorder that’s been studied for decades: myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS), which is characterized partly by unexplained fatigue.
Researchers hypothesize that the two conditions may have similar causes. They also hope that existing knowledge about ME/CFS might be able to help some long COVID patients and that the study of long COVID may spur treatments for ME/CFS and better care for patients.