Based on CDC and WHO guidance, checked against those sources on Oct 12, 2026. Educational information only — not a diagnosis or a substitute for a licensed healthcare professional.
Dengue is a viral infection spread by mosquitoes, common in tropical and subtropical regions. About 1 in 4 infections causes illness. Most people recover in about a week, but dengue can become severe and life-threatening.
Symptoms usually begin 5–7 days after the mosquito bite (range about 3–10 days) and last 2–7 days.
Where: Global · 15 countries, including Colombia and Vietnam
Excerpt from U.S. CDC Travelers' Health:Dengue is a year-round risk in many parts of the world, with outbreaks commonly occurring every 2–5 years. Travelers to risk areas should prevent mosquito bites.
Where: Country report · Islamic Republic of Iran
Excerpt from World Health Organization:On 14 June 2024, the Ministry of Health and Medical Education (MoHME) of Iran reported the first two locally acquired cases of dengue recorded in the country. Local transmission of dengue within the community was confirmed in Bandar-Lengheh, Hormozgan Province, southern Iran. As of 17 July 2024, the total number of locally acquired (autochthonous) dengue cases in the country has risen to 12, all reported in Bandar-Lengheh. Dengue is a mosquito-borne viral disease caused by the dengue virus, with the potential to cause a serious public health impact. The primary vectors that transmit the diseas
Call 911 (U.S.) or your local emergency number.
