Hairy leukoplakia is characterized by a white patch on the side of the tongue with a corrugated or hairy appearance. It occurs in immunodeficient people, particularly in HIV infection. The cause of the condition is an opportunistic infection by the Epstein-Barr virus.
Infectious mononucleosis is a very widespread viral disease caused by the Epstein-Barr virus. The disease is also known as EBV Infectious Mononucleosis or Pfeiffer's Disease or Filatov's Disease and colloquially as kissing disease, mono (North America) and as glandular fever in other English-speaking countries. The disease is characterized by fever, sore throat and fatigue.