About 25% of people affected by Chronic Fatigue Syndrome are severe cases, which means they are bed-ridden, house-bound or wheelchair-bound at some point in their illness.

About 25% of people affected by Chronic Fatigue Syndrome are severe cases, which means they are bed-ridden, house-bound or wheelchair-bound at some point in their illness.

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Chronic fatigue syndrome may be due to an overactive immune system, study finds

Chronic fatigue syndrome, a condition that causes extreme tiredness, could be triggered by an overactive immune system, a study has found.