I have a friend hrs has mono. do i need to stay a way from her? is contagious ?

Mononucleosis: This is highly communicable and usually by direct contact but may be by other means of spread. If your friend now has symptoms they may have been infected for the past 4 to 8 weeks. What is more, the probability is that you have been previously infected with this very common Epstein-Barr Virus.

Depends: Most adult mono patients will shed virus in their saliva for 2-3 weeks and some longer. The virus can live for some time on surfaces outside the body.The role of any airborne material is unknown but likely minimal. If the contact with the person is social but not intimate, and routine hand washing is practiced, I see no reason to isolate this person.