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Mononucleosis (Mono) is an illness caused by a virus, usually the Epstein-Barr virus (EBV). Many people catch mono as children and have mild flu-like symptoms. Even as adults, most people who get mono are only sick for a few weeks. Many people infected with mono don’t get sick or have such mild symptoms they never know they have it. Most people who have had mono are then immune (they won’t get sick again if exposed to the virus). Very rarely a reactivation of the mono virus has been reported.
85-95% of adults in the U.S. have had mono by the time they are 40; only about 20% know they’ve had it.
Classic Mono Symptoms:
· Swollen lymph glands
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