What are the symptoms of mononucleosis?

The most common cause of mononucleosis is the Epstein-Barr virus (EBV) which is spread through saliva. The incubation period for mono is about four to six weeks, which means it generally takes several weeks after exposure to the virus before symptoms appear.

Symptoms of mononucleosis vary from person to person but may include:

  • extreme fatigue
  • fever
  • sore throat
  • head and body aches
  • swollen lymph nodes in the neck and armpits
  • swollen liver or spleen or both
  • rash

Symptoms typically last several weeks to months. It is common for the fever and sore throat to resolve within 2-4 weeks, while the fatigue and enlarged spleen may persist for longer.

Due to the risk of spleen enlargement with mono, you should avoid contact sports until you fully recover. Participating in contact sports can be strenuous and may cause the spleen to rupture.

How does mononucleosis spread?

Mononucleosis (EBV) is spread through oral secretions – the passage of saliva from person to person.

How do I prevent mononucleosis?

Unfortunately, there is no vaccine to protect against mononucleosis. The best protection is to avoid kissing or sharing drinks, food, or personal items (like toothbrushes) with people who are ill or are known to have mono.

What are my resources if I contract mononucleosis while at school?

If you are experiencing the symptoms above and they have not improved in 1-2 weeks, consider making an appointment with Student Health and Counseling (SHAC). If appropriate, you may be tested for mono at that time.

It is possible that the symptoms of mono may make keeping up with academic requirements during the term difficult. Should you need support while you are ill, we recommend that you reach out to your Class Dean and/or the Office of Accessibility Resources.

For additional health resources, please reference the CDC website.