I just want to chime in because I also worry about whether or not we are doing enough at this stage in my LOs' lives. Both my kiddos started CPTs at 2 months, but our clinic doesn't start nebs until they are needed or until the child turns 6 yo. We are seen at John's Hopkins and the doctors told me that their is no evidence that prenentative nebs are beneficial in children under 6, so unless they are needed, they don't prescribe them. I think it's more because there aren't enough studies done on children under 6. Anyway, I trust them as I know they are a very good clinic, but so many other clinic seem to start the nebs right away. I really wish there was more of a standard as far as preventative treatments and when they are started. That being said, except for the early hospitalizations involved with their MIs surgeries, my kiddos have been very healthy (knock on wood***). They've never cultured anything, and their baseline coughs are zero. Our CF doctor said he would have no problem starting them on nebs if I wanted to and there were other families at the clinic that do start them early only for preventative measures. I just go back and forth on what I should be doing.