mono is basically, a "disease" that causes your throat to be sore and causes you to be tired. You also have an enlarged splean and your throat glands are swollen(which causes your throat to be sore) This sickness, if treated properly with rest is nothing to be concerned of but if you are out skiing, lifting stuff or doing pretty much anything physical can cause your splean to erupt which could be deadly if not caught in time, but if it is you can still live without your spleen. Mono is also known as "The Kissing Disease" because it can be caught by kissing, but it also can be caught by being over tired, which was the case of the last one for me. Also alot of the time when you have mono you have strep throat as a "warm up".