The World Health Organization has deemed dengue fever a "pandemic threat." Transmitted by the bite of a female mosquito, this disease is now present in more than 125 countries–even more than malaria. There are no treatments or vaccines available at this time. While it rarely occurs in the continental U.S. it is endemic in Puerto Rico. The flu-like symptoms usually occur 4-7 days after the mosquito bite and last 3-10 days.
PositiveTip: Best control measures: Avoid mosquito bites, and remove standing water to limit breeding mosquitos.