My boyfriend was diagnosed with mono, what can we expect moving forward?

Most often nothing.: About 75% of americans have the eb virus, the cause of mono. Mono is usually transmitted by kissing (hence known as "the kissing disease"). So you may have it too. Mono can cause some individuals too become quite ill. Others think they have a mild cold and nothing more. Some can get "chronic mono, " for which no treatment exists, but this is less than 1/100.