I am wondering if any of the people who developed cfs after having mononucleosis may have had xmrv or some other retrovirus smoldering in the background. If your cfs started after mono, I would very much like to hear from you on the following questions. 1. Did you have cholic as a baby. 2. Were you particularly active as a pre-schooler? 3. Did you have a problem with aching legs as a child? 4. As a pre-schooler were you sick more than other children? unusual illnesses such as scarlet fever? Asthma? Allergies? 5. Did you ever fall asleep at school? In the case of my daughter: 1. Yes 2. yes 3. yes 4. yes, I recall immediately following roseola she got another illness. Often ill with ear aches, scarlet fever, asthma, and allergies. 5. yes Thanks.