A landmark study of myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) has just reported preliminary results, suggesting that the DNA of people with the condition is markedly altered in eight key regions.

ME/CFS affects an estimated 67 million people worldwide. There is no specific test or cure for the condition, and patients can experience substantial challenges when seeking a diagnosis, often reporting that they are disbelieved by medical professionals.

There are different degrees of severity, but the numerous possible symptoms include extreme fatigue that is not relieved by rest. One of the key features of ME/CFS is post-exertional malaise (PEM), where symptoms get disproportionately worse after even mild physical or mental activity.

In the most severe cases, patients ma

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