Infections
Many viral and bacterial infections have been proposed to cause or associate with CFS, but no infectious influence on pathophysiology has been proven. A reportedly higher winter onset of CFS has led some to hypothesise that symptom onset is precipitated by a viral infection in some people. However, although symptoms of CFS can occur after severe infection, strong data do not yet exist to support an infectious process in disease maintenance.
Read more about this topic: Pathophysiology Of Chronic Fatigue Syndrome