Mononucleosis—commonly known as “mono” or the “kissing disease”—is a viral infection caused by the Epstein-Barr virus (EBV). It spreads through saliva and can fatigue you for weeks or even months. If you’ve been experiencing extreme tiredness, a sore throat, swollen lymph nodes, or fever, it’s essential to get tested. In this blog, we’ll walk you through the step-by-step process for diagnosing mono so you know what to expect when you ...