Hello Welcome to HCM . Thanks for sharing your concern with us . Infectious mononucleosis spreads through saliva that is why it is known as kissing disease also .Sharing drinks and eating in same utensils with others also can cause as saliva can be passed . Once a person got this infection then virus remains in body for all life in dormant stage and time to time it s infects 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 selflimiting 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 week following the infection . I would suggest you to consult with your PCP further . Best Regards, DR.S.TOMAR