I guess it is indeed true that prevention is still the best cure. Especially in the case of dengue fever, as no cure has been found for the actual disease itself. Now, the best way to prevent dengue fever is to avoid contact with mosquitoes. If you are traveling to an area where there are reports of dengue fever cases, it is best to bring mosquito repellent containing DEET. Apply repellant in the morning and in the late afternoon, as dengue-carrying Aedes mosquitoes usually bite during the day. You can also wear long sleeved-shirts and long pants if the weather permits it.