Epstein-Barr Syndrome, also known as mononucleosis or glandular fever, is a viral infection caused by the Epstein-Barr virus. Symptoms may include fatigue, fever, sore throat, swollen lymph nodes, and enlarged spleen. Other synonyms for this condition may include infectious mononucleosis, kissing disease, mono, Pfeiffer's disease, or EBV infection. The virus is commonly transmitted through saliva, which is why it is often called the kissing disease. It is important to note that most people are infected with the Epstein-Barr virus at some point in their lives, but may not develop any symptoms. Treatment options for Epstein-Barr Syndrome typically involve rest, hydration, and over-the-counter pain relievers.