Chronic fatigue syndrome affects up to 2 percent of people worldwide.

至今，患上慢性疲劳综合症的人数已经达到全球总人数的2%。

Note: Sometimes chronic fatigue can be a sign of deeper problems.

注意：有时习惯性疲劳是一些深层问题的症状。

More Bad News for Chronic Fatigue Syndrome and the Mouse Virus Thesis

关于慢性疲劳综合症和鼠源病毒的坏消息

Chronic fatigue is also one of the salient features of depression.

慢性疲劳也是抑郁症的显著特点之一。

Contracting chronic fatigue in my early thirties was therefore a great gift.

因此，我三十出头的时候患上的紧缩性慢性疲劳是一个珍贵的礼物。