How serious is mono in adults?
It most commonly occurs in adolescents and young adults. In general, mononucleosis is not considered a serious illness. However, mononucleosis can lead to significant loss of time from school or work due to profound fatigue and, on rare occasion, can cause severe or even life-threatening illness.
What are symptoms of mono in adults?
These symptoms 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.
What is mono caused by in adults?
The most common cause of mononucleosis is the Epstein-Barr virus, but other viruses also can cause similar symptoms. This virus is spread through saliva, and you may catch it from kissing or from sharing food or drinks.

Is it common for adults to get mono?
How Common is Mono? The Epstein-Barr virus that causes mono is very common and around 90% of Americans are infected with it by age 35.
What causes mono to flare up?
What causes mono flare ups? Epstein-Barr virus (EBV) causes mono infections and remains in your body for your whole life. EBV is actually a member of the herpes virus family — EBV is also called human herpesvirus 4.
What is the last stage of mono?

Now you have the symptoms of mono like sore throat, fever, swollen glands, etc. The final stage, the convalescent period, can last from 2-6 weeks to up to 3 months. During this time you’ll feel much better, but are still weak and tired.
What is chronic mono?
Mononucleosis rarely leads to a serious condition called chronic EBV infection. In chronic EBV infection, you have long-lasting symptoms and a viral infection that lasts longer than usual after your original mononucleosis diagnosis.
What should you not do when you have mono?
So doctors recommend that teens who have mono avoid contact sports for at least a month after symptoms are gone. Don’t do any strenuous activities until your doctor says it’s OK. In most cases, mono symptoms go away in a matter of weeks with plenty of rest and fluids.