The shots question jump started my concern for my health while in Belize, so I made an appointment with my travel clinic here in Austin. It seems that if you are spending all your time on AC, you don't have much to worry about. Since I am spending time in the jungle and Guatemala, I got a typhoid shot as well as Hep A/B and malaria pills. That typhoid shot is SMARTS! Boy does my arm hurt. So, if you're not going into the jungle, it sounded like you are pretty safe. However, I am not a doctor, and this is not medical advice, so don't sue me if I'm wrong. (us lawyers are always paranoid - disclaim everything)