Mononucleosis, commonly known as mono, is a viral infection most often caused by the Epstein-Barr virus (EBV). After exposure to the virus, symptoms don't appear immediately. Instead, there's an incubation period during which the virus silently multiplies in the body. Typically, symptoms begin to surface four to six weeks after initial exposure, though this timeframe can vary depending on the individual's immune response and overall health. Understanding this delay is crucial for ...