Epidemic transmission is usually seasonal, during and shortly after the rainy season.
There are no travel restrictions in any country with regard to dengue, however many cases have been reported in travelers returning from the areas listed below. Generally, there is a low risk of acquiring dengue during travel to tropical areas where dengue fever normally occurs except during periods of epidemic transmission. Dengue outbreaks have occurred with increasing frequency in recent years in most countries of the tropics. There is a somewhat lower risk for travelers to Taiwan and the Pacific Islands. The Middle East and Northern Australia have a still lower risk of Dengue transmission.