My daughter is 23 and she met and started dating her first boyfriend on Sept 9th.  Last monday she became very ill with mouth sores and thoat infection.  This tuesday she was test for mono and it came back positive.  She has lived a pretty sheltered life and I am wondering what the chances are that she contacted mono from this boy.  If so would he not show signs.
HelloWelcome to Chat Doctor. Thanks for sharing your concern with us. Infectious mononucleosis spreads through saliva that is why it is known as kissing disease also. Sharing Chat Doctor.  Once a person got this infection then virus remains in body for all life in dormant stage and time to time its infections others, so it means that person is not contagious all time, but sometimes virus gets activated from dormant state. There is also possibility that a person never got clinical manifestations of mono but carries the virus in saliva and can spread it. Most of the people get this infection in their childhood and develop acquired immunity. This infection is self limiting and rarely cause any complication. Paracetamol should be taken for fever and corticosteroid can be prescribed by your doctor for throat pain, if severe. Any strenuous work or exercise should not be done for 6 weeks following the infection. I would suggest you to consult with your PCP further. Best