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What causes mono?

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Quick Answer

Mononucleosis, commonly referred to as mono, is a condition caused by the Epstein-Barr virus. Characterized by a sore throat, fever, lingering fatigue and swollen lymph nodes, the symptoms of mono can last up to two months. In most cases, however, treatment simply involves getting enough rest and good self-care, as stated by Healthline.

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Full Answer

Mononucleosis can be carried from one person to another through mucus, saliva and tears. Though it most frequently occurs in teenagers, those of any age can contract mono. However, older adults typically do not contract mono because their immune systems are strong enough to fight the infection, notes WebMD.

Though debilitating, mono is not often serious, however, in rare cases serious complication can occur, such as swelling of the spleen or liver. It is important to contact a qualified medical professional immediately if symptoms worsen, or change in a way that is concerning.

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