Mononucleosis

Mononucleosis (also called "Mono", glandular fever, and, colloquially, the "kissing disease"), is a disease most commonly caused by the Epstein-Barr virus (EBV). EBV affects the lymphocytes which are white blood cells involved in the adaptive immune system. Mononucleosis can also be caused by cytomegalovirus (HCMV), a herpes virus most commonly found in body fluids. While CMV can cause mononucleosis, 85% of the cases are associated with EBV. The disease can be found in anyone but is most commonly contracted by adolescents and young adults ages 15–35.