Twenty (20) human cases of dengue fever (acquired locally) have been reported in Monroe County (South Florida) over the last few weeks.
But it was just announced that a recent survey (with blood tests) of 240 residents showed “that 41 percent had been exposed to the dengue virus or other Flavivirus, either through exposure to one of the viruses or through vaccinations, such as the yellow fever vaccine.”
While UF medical entomologists and DOH researchers do not expect the outbreak to spread beyond Monroe County, they do agree it is time for Florida residents to take a more active approach to prevention of mosquito-borne diseases.
For information about mosquito repellants (really good info here): http://edis.ifas.ufl.edu/in419
For more information on Dengue virus see this link: http://www.cdc.gov/Dengue/