I know that their are sometimes religious or medical reasons parents use for not vaccinating their children. Have any of you ever given the ethics on this subject much thought? BTW, for medical reasons my medically fragile son could not get the Tdap vaccine after his bone marrow transplant. He somehow came down with pertussis and it almost killed him. I was a little ticked because this disease was almost eradicated until not that long ago. I know that there is growing segment of misinformed parents who refuse to vaccinate themselves or their children. Thoughts?