no, this isn't true. there are plenty of schools that will ask you questions about health care to see if you're aware of current health issues. some schools will grill you on it. better to be prepared and to be able to speak intelligently than to not know anything and look REALLY bad if something like this comes up. you don't need to know how to solve america's health care problems, but be aware of some basic issues.
i can't remember any good websites off-hand, but there was a thread about this a while back and some other people posted some good links. do a search for it or scroll back a few pages on this board to find it.