"Very," Katie admits. She worked hard to get where she is and she wouldn't trade her job for any other, but it's a difficult one. The actual medicine is only part of that. There are some days she comes home heartsick, wanting nothing more than to hold her son. "It's... it's very rewarding, too. There are so many kids I'm able to help and that makes it worth it." Their parents are always so grateful and so is she, knowing how afraid they must have been, amazed still that she's able to help.

"But sometimes there's nothing we can do. I can never get used to that."