I have always looked at http://www.cdc.gov for information when I traveling to "questionable health" countries and found the advice very good. Once you log on, go to travel tips and put in the area you plan to travel. Not only does it tell you what disease is a problem but what medication is best for that area. Malaria can be resistent to one drug in an area and not in another. Also they will tell you what other health risks are in that area.

Wilma in cloudy Kansas City