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Mononucleosis is a viral infection that affects your lungs, liver, and lymphatic system or tissue fluids. The virus, known as Epstein-Barr, usually affects people between the ages of 12 and 40 years.


The virus is spread mainly by saliva and you can get it by close contact, such as kissing. Mononucleosis is caused by the Epstein-Barr virus, a member of the herpes virus family. The disease develops if the virus is encountered for the first time at an age when the response of the body's immune system is most vigorous. The peak incidence of the illness occurs around the ages of 15 and 17.


Typically, the initial symptoms and signs of mono occur about 10 days after exposure in children and 30 to 50 days after exposure in adults, symptoms and signs may become present, including:

  • Severe sore throat
  • Fever
  • Swollen glands in the neck,
  • Nausea
  • Vomiting
  • Upset stomach
  • Swollen liver
  • Swollen spleen
  • Swelling around the eyes
  • Weight loss
  • Rash
  • Muscle aches or stiffness


There is no specific cure. Eating healthy foods and getting extra rest are important. Drink plenty of water or juice every day.


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