Personally, I have never taken any type of special shots before visiting or moving to Belize. I don’t know of other expats who have, but we live on Ambergris Caye, which is an island that is pretty developed. It depends on where you plan to travel. If you will be going into very remote jungle areas, backpacking on eco-tours, then it makes sense to take more precautions.
My main concern if I was going to camp in a remote jungle area would be mosquitoes that carry malaria or Dengue fever, since the government doesn’t spray to control mosquitoes in the less populated areas. They regularly spray here on the island to keep the mosquito population down.
I have not heard of any expats getting hepatitis A, malaria or typhoid. But I have known several who did get Dengue Fever, from mosquito bites.
In terms of typhoid, you can buy bottled water easily.
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