I see abbreviations with no explanations (unless I've missed it, in which case I apologize!) I know PEM is post-exertional malaise (and that is described), and CFS is Chronic Fatigue Syndrome. But please, what does ME stand for?

‪2/‬ ‪“When their ‘battery’ gets low, their symptoms get worse & their ability to function & move their bodies declines. If they keep pushing even though their battery has drained, they will ‘crash’. This is the ‘red zone’ known as PEM, when complete rest is the only safe activity”‬ #PwME #LongCovid

Thanks for this!