Infectious mononucleosis (mono) is often called the kissing disease. If you have mononucleosis, it's important to be careful of certain complications such as an enlarged spleen. The most common cause of mononucleosis is the Epstein-Barr virus, but other viruses can also cause.
It occurs less commonly in adults over the age of Older adults with mono will usually have a fever but may not have other symptoms.
Mononucleosis, otherwise known as mono, glandular fever, or the “kissing Why symptoms affect teens and young adults more severely.