“I wish to clarify the situation regarding the classification of neurasthenia, fatigue syndrome, post-viral fatigue syndrome and benign myalgic encephalomyelitis. Let me state clearly that the World Health Organization (WHO) has not changed its position on these disorders... Post-viral fatigue syndrome remains under the diseases of nervous system as G93.3. Benign myalgic encephalomyelitis is included within this category. Neurasthenia remains under mental and behavioural disorders as F48.0 and fatigue syndrome is included in this category. However, post-viral fatigue syndrome is explicitly excluded from F48.0.” CfsChronic Fatigue SyndromeMyalgic EncephalomyelitisMe CfsWorld Health OrganizationNeurasthenia Author:Benedetto Saraceno