In plain language
What it is
A long-recognized post-viral illness that overlaps heavily with long COVID, including similar vascular impairment.
Why it matters
Decades of ME/CFS research, especially on pacing and post-exertional malaise, apply directly to many people with long COVID.
Think of it like
An older sibling illness that long COVID strongly resembles.
For specialists
Formal definition
Myalgic encephalomyelitis / chronic fatigue syndrome, defined by post-exertional malaise, unrefreshing sleep, and cognitive or orthostatic dysfunction.
Sources
- Long COVID and ME/CFS show similarly impaired vascular function free full text ›