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Medical condition

Chronic fatigue syndrome (CFS), also referred to as myalgic encephalomyelitis (ME), is a medical condition characterized by ...

A chronic condition is a health condition or disease that is persistent or otherwise long-lasting in its effects or a disease ...

A syndrome is a set of medical signs and symptoms which are correlated with each other and often associated with a particular ...

A therapy or medical treatment is the attempted remediation of a health problem, usually following a medical diagnosis.

A disease is a particular abnormal condition that negatively affects the structure or function of all or part of an organism, ...

Virus

The Epstein–Barr virus, formally called Human gammaherpesvirus 4, is one of the nine known human herpesvirus types in the ...