Hi Thanks for posting on HCM The length of time someone with mono remain contagious is unclear, however, the chances of passing the infection to another person is highest during the first 6 weeks following infection.Some studies however show that an infected person may spread the infection for many months and possibly up to a year and a half. There exist no specific drug for this condition.Treatment mainly involves bed rest, good nutrition and enough hydration.I will suggest the following: -Strict rest -Drink plenty of water and fruit juice -Take pain medications like ibuprofen if pain -Gargle with salt water many times per day if sore throat -Mononucleosis is spread through saliva. If you re infected, you can help prevent spreading the virus to others including your girl friend 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. Hope this will help you Wish you a speedy recovery