Florida has an abundance of skeeters, but they do not test positive for malaria.

Yes but that was not always the case. Malaria was endemic to North America and existed from Florida all the way up through Minnesota. The CDC was formed as the center for malaria control. I was responding to the point that "pretty much all rich countries" are in areas with climates not conducive to malaria. There are at least a half dozen rich countries that once were endemic to malaria. USA, Hong Kong, Australia, Italy, Singapore, etc.