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“I would describe it like being a broken battery, where every time you try to charge me, you know, I maybe fill to 5 percent […] I think the thing that is really hard to understand about this illness is just how much it takes away from you and how so many of the basic things that make one feel like a human being just become impossible.” Jennifer Brea, ME/CFS patient and director of Canary in a Coalmine.

Myalgic Encephalomyelitis (ME) – also known as Chronic Fatigue Syndrome (CFS) – is a severely disabling disease that affects multiple body systems including the brain, immune system, endocrine system, autonomic nervous system, muscles and the gut.

The key symptom is “post-exertional malaise”: a flare-up of symptoms including severe exhaustion, flu-like malaise, pain, and cognitive difficulties, following effort that can be as trivial as sitting in a chair or brushing one’s teeth, and often delayed by up to 24 to 48 hours.

Many cases of ME/CFS begin with an acute viral illness. There have been outbreaks of ME/CFS in many countries, including the US. The disease can, like polio, occur in outbreaks, in clusters or as individual cases.

Organic, not psychological

There is a great deal of research showing immune and other abnormalities in ME/CFS patients, but the tests used are rare in clinical practice. Two recent, major reports commissioned by US government health agencies — the IOM and P2P reports — summarise this research and state clearly that ME/CFS is not of psychological origin.


Like MS, ME/CFS can relapse and remit, remain stable, or progress. There is a range of disability. An estimated 25% of patients are housebound or bedbound: many have been so for decades. As few as 4% of severely affected patients ever recover.

Some patients are able to live a partially normal life but may, for example, only be able to work by taking extensive bedrest afterwards. Many quite severely affected patients might be able to spend a brief period out of the house and can appear perfectly healthy for that short time before their symptoms build and they are forced to rest. The most severely affected patients are confined to bed, unable to care for themselves.


An estimated one million Americans, 250,000 Britons, and over 100,000 Canadians and Australians have ME/CFS. Worldwide prevalence is at least 17 million. As with autoimmune conditions such as MS and lupus, most patients are women. It strikes all racial, ethnic, and socio-economic groups.

ME/CFS can occur at any age. Many children have the disease and lose many years of school. Some do not recover and never have the chance to go to college, have a career, marry or have a family.

Economic cost

ME/CFS has a huge impact on national economies. It costs the US economy, for example, over $17 billion each year. Its prevalence, economic effect, disabling impact and chronicity create a heavy burden for both patients and society.


Despite the huge cost to national economies, ME/CFS has been neglected by governments worldwide for decades and very little has been spent on research. MS has a similar disability profile to ME/CFS but affects only 4 people for every 10 with ME/CFS. Nevertheless, in the US, for example, MS typically receives roughly 60 times more funding per head than ME/CFS.


No country has any approved drug therapies for ME/CFS and there are few specialists. Although doctors can help with some symptoms, patients are essentially left on their own to deal with a chronic, devastating disease.

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