Prevention

Mononucleosis is spread through saliva. If you're infected, you can help prevent spreading the virus to others by not kissing them and by not sharing food, dishes, glasses and utensils until several days after your fever has improved — and even longer, if possible. And remember to wash your hands regularly to prevent spread of the virus.

The Epstein-Barr virus may persist in your saliva for months after the infection. No vaccine exists to prevent mononucleosis.