PreventionBy Mayo Clinic staff
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 subsided and even longer, if possible.
The Epstein-Barr virus may persist in your saliva for months after the infection. No vaccine exists to prevent mononucleosis.
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