Like FabulousPaula said, try to make it something that isn't such a big deal. I remember growing up my sister would get sick all the time. I always remember my mom saying to her, "If you don't stop throwing up we're going to have to take you to the hospital." I think that fueled my fear even more. For me going to the hospital was a bad thing...it isn't so much any more because I've spent so much time in the ER but back then it was terrible.
If you take care of her when she's sick and everything then she probably didn't get the fear from you. Sometimes things just develope on their own. You should remind her that she probably will get sick but you will always be there to take care of her when it happens.
~Monica
David Duchovny I want you to love me
To kiss and to hug me, debrief and debug me
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I\'m sweet and I\'m cuddly-I\'m gonna kill Scully!