WebMD is one of the most popular websites on the internet. On this site, you can research almost any medical question that you can imagine. During the flu season, you can imagine how many people were asking about their symptoms and trying to diagnose themselves. There are lots of other sites that have great amounts of medical information as well. Some people claim to like other sites more than WebMD. Of course, favorite websites are always a matter of opinion. Any site that you can find for answers to medical questions can be incredibly informative and helpful. However, exercise caution when actually getting medical information off of the internet.