Dengue fever is most often transmitted to humans by the Aedes aegypti mosquito, which has been responsible for recent outbreaks in Texas and the northeastern Mexican state of Tamaulipas. The disease has also been active in the low-lying coastal regions of Veracruz and along the Yucatan Peninsula. There is no vaccination for Dengue Fever. Prevent exposure with mosquito repellents (containing DEET) and protective netting during the day. (This mosquito prefers to hunt during daylight.)