I don't know. I recently has mono. I was out of school for about 2-3 weeks. All my symptoms are gone and My doctor said that I was not contageous but she didn't take a blood test. She said I can return to school too. So i figured that since she said I wasn't contageous I could kiss my boyfriend. We did kiss. And Now im REALLY REALLY nervous that he will catch mono. He had mono once before but like 3 years previous before we started going out. He's big on wrestling and it's wrestling season and I'm big on track and I recently had to quit because it could strain me or something. I really don't want him to cathc it and now I hear you could be contageous for about 6 months. Please get back to me.