hi this piece of info may help you. prognosis and possible complications most people with mono recover fully and can return to school or work in a few weeks. a small number of people may experience fatigue for several months. severe complications are uncommon. they may include anemia problems with the central nervous system or liver rupture of the spleen or inflammation of the heart. people who have had mononucleosis are at incresed risk of developing multiple sclerosis this is from <link> if you need more info just copy this link into google to open and read. hope its what you want. good luck
how does mono affect your immune system? . my son had mono a couple years ago and every now and then he gets very tired. he also seems to be more susceptible to colds and flu. for example he may come down with something and meanwhile others in the family or even in his classroom at school do not catch it - or if they do the symptoms of others seem to not last as long. i was just wondering could mono have had an effect on his immune system?