My 7 year-old and 5 year-old are recovering from mono. They had a tough time with it. They were wiped out all the time. Does anyone have any experience with mono and cf. I have heard that once you have had mono, sometimes your health is not quite the same, i.e. have to be extra careful to get rest. If that is true, I was wondering about how that might have a worse effect when you have cf as well. Also, I thought little children are not usually affected by mono, only teenagers and older getting sick with it. We have a clinic visit in a couple of days, and I was going to ask dr. about it, but I thought I might ask here about your experiences.