Lymph node disorders

Infectious mononucleosis is a worldwide viral disease accompanied mainly by high fever, angina and enlarged lymph nodes. The virus is spread by interpersonal contact. The disease is mainly transmitted by saliva and is therefore also known as "kissing disease". What are the symptoms of infectious mononucleosis, available treatment options and prevention?

Sarcoidosis is the name for a rare disease affecting various organ systems. Why does this rare disease occur and what symptoms characterize it?