I only vaguely recall learning about mono waaaay back when. What is it actually if not a bug? It's contagious in some stages right? I can't clear the cobwebs at this hour :P
What is mononucleosis?
Mononucleosis (often called "mono") is an infection caused by the Epstein-Barr virus. Signs of mono include fever, sore throat, headaches, white patches on the back of your throat, swollen glands in your neck, feeling tired and not feeling hungry.
How is mono passed?
Mono is not spread as easily as some other viruses, such as the common cold. The mono virus is found in saliva and mucus. It is usually passed from one person to another through kissing, although it may rarely be passed in other ways, such as coughing. Signs of mono usually develop 4 to 6 weeks after you're exposed to the virus. Generally, people only get mono once. It's most common among people 15 to 35 years old.