Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. One of the most widespread viral diseases in humans is the Infectious mononucleosis, also known as mono or the “kissing disease”, caused by the Epstein–Barr virus (EBV), one type of herpes virus, to which more than 90% of adults have been exposed, according to US Centers for Disease Control and Prevention. Most people are exposed to the virus as children, when the disease produces no noticeable or only flu-like symptoms. However, in adolescents and young adults, the disease is characterized by fever, sore throat and fatigue, along with several other possible signs and symptoms. Learn more about the Infectious mononucleosis, its effects on human health and the virus that causes in this book.