Vertical search engines are search engines that target a specific industry vertical, for instance healthcare. There are actually a couple of good vertical search engines out there for healthcare. The first is Kosmix. This was the first one that I used so it might be biased. It was started by some guys from Stanford, the same place that Google was born. It offers many different ways to get at subgroups of results for instance, just those related to clinical trials.
The second is Healia.I found this today and it actually inspired me to write this article. It is alot simpler than Kosmix but also seems to return good results. Have a look at them. I think that they are both better than Google for general health information.