Epstein-Barr virus (EBV) is the type species of lymphocryptovirus, belonging to the subfamily of gammaherpesvirinae, infecting B-cells in humans. It is thought to be the causative agent of inectious mononucleosis (IM) and is strongly associated with oral hairy leukoplakia, burkitt lymphoma and other malignancies. IM is a common, acute infection usually caused by EBV. There is an increase in mononuclear white blood cells and other atypical lymphocytes, generalised lymphadenopathy, splenomegaly, and occasionally hepatomegaly with hepatitis. Description adapted from https://www.ncbi.nlm.nih.gov/mesh/68004854 & https://www.ncbi.nlm.nih.gov/mesh/68007244.