I haven't tried to donate blood since high school so things might have changed, but at the time I couldn't give blood because CF was considered an "endocrine disorder" because of the pancreatic involvement. Obviously a bit of bad information there. My doctor at the time said that the rule was "the stupidest thing ever." At least I can feel guilt-free about avoiding the huge needles whenever a blood drive comes up <img src="i/expressions/face-icon-small-smile.gif" border="0">