Chronic Fatigue Syndrome (CFS) is a pathological condition that manifests itself as chronic fatigue that lasts at least 6 months and leads to disorders of the immune, endocrine, nervous, and other body systems. A person is constantly disturbed by fatigue and weakness, which does not go away even after a good night's rest and sleep. Patients aged 20 to 40 years are most affected by CGF, although the syndrome also occurs in children and the elderly. Women suffer from it four times more often than men.
Two types of CCS are distinguished — infection-associated and non-infectious variant. Although this syndrome is considered to have no clear cause, most often its development is associated with chronic reactivation of human herpesvirus type 6 (HBV-6, HHV-6) and type 7 (HBV-7, HHV-7). The role of other herpesviruses, some enteroviruses, pneumococci, etc. in the development of this syndrome is not excluded. Relatively often this syndrome is observed in the clinical course of other diseases — fibromyalgia, asthenia, depression, neurosis, etc.
