Mononucleosis

Mononucleosis, also called infectious mononucleosis or glandular fever, infectious disease commonly affecting adolescents and young adults. Symptoms include severe sore throat, headache, fever, and enlargement of the lymph nodes and spleen. It is believed to be caused by a herpes virus. Severe cases may require steroids, and convalescence may be lengthy.

See also: Herpes; Epstein-Barr (EB) virus.