An Anti-cancer drug could be a treatment for Chronic Fatigue (CFS) also known as myalgic encephalmyelitis. I myself have suffered from CFS and still struggle to get the energy others seem to have, I have also found that during times of illness or fatigue, my white blood cell count would be higher.
“Rituximab works by destroying white blood cells that make antibodies, called B cells. The results of the trial therefore suggest that these white blood cells might be involved in causing CFS – a disorder also known as myalgic encephalomyelitis (ME), and one that has so far defied explanation.”
Having suffered almost 5 years of 60% disablement from CFS I can tell you that it is a very frustrating condition. Especially when you find yourself getting ill from doing excercise, it’s meant to be the other way round!
More info can be found in the below article.