Well, the first question would be... how long do you intend on staying in Belize? If you're just going down as a normal, regular tourist and staying a week on the island, then I wouldn't even bother getting any shots... you don't need them.
If you're going into the interior for a week stay, it's 6 of one and half a dozen of the other. You really don't need any for that either.
If you are going for an extended period of time... weeks... then you would need them.
You kind of answered your own questions when you stated "I have not heard about this on this board or any other"... if it's not on here then don't worry about it.
[Disclaimer] if you do not get any shots and you get malaria or West Nile Virus or any other tropical disease, etc., etc., I cannot and will not be held responsible. Plus I don't have any money to sue me for.
Plus also... laugh... you said you didn't mean to create any new fears or cocerns... laugh Now really... if you've been reading this section of the board and seen the postings on here you should know that no one on here has any concerns or fears about anything. Well except for the dreaded Bill Thornton disease... sorry, no known cure for that.