<s>[INST] I had mono about 3 yrs ago. I am 50 now. The mono was really bad and I had to miss a few months of work but was still very fatigue for about 8-9 months. Every time I really exhausted now, I seem to get these slight headaches and fevers. Every time I get sick, it seems to take longer to recover cause I get these fevers and headache, light headedness afterwards/ could this be a long term affect from the mono? thanks, Deb [/INST] Hello dear, Thank you for your contact to Chat Doctor. I read and understand your concern. I am Chat Doctor answering your concern. Yes, infectious mononucleosis can occur as chronic infection. Usually the infection of infectious mononucleosis is very benign, it will be cured without any adverse consequences. But in some cases it can be seen as chronic infection this is more common in immunocompromised states, organ transplantation and cancer chemotherapy. The prognosis for these conditions are very poor. I suspect you are having chronic infection. For the diagnosis purpose you can take the viral antibody test done. Treatment of the chronic condition is very challenging. Only chronic fatigue specialist can help you. I will be happy to answer your further concern on bit.ly/ Chat Doctor. Thank you, ChatDoctorInfectious diseases specialist, ChatDoctor. </s>