Infectious mononucleosis is the fancier, medical term for what we all know as “mono.” Mono is a viral illness that usually affects teens and young adults, and it causes symptoms like extreme fatigue and a fever. Our AFC Urgent Care South Charlotte team shares other helpful info on mono below, so keep reading! What Causes Mono? Mono can be caused by a variety of viruses, but the Epstein-Barr virus (EBV) is the most common cause ...