Dengue is a viral infection caused by the dengue virus (DENV), which is transmitted to humans through the bite of infected mosquitoes. About half of the world's population is now at risk of dengue, with an estimated 100–400 million infections occurring each year.

Dengue is spread by several species of female mosquitoes of the Aedes genus, principally Aedes aegypti. [1] The virus has four confirmed serotypes; infection with one type usually gives lifelong immunity to that type, but only short-term immunity to the others.

Featured Signs and Symptoms About 1 in 4 people infected with dengue get sick. Severe dengue is a medical emergency.

Dengue is transmitted by the bite of an infected mosquito. It is an illness that affects infants, young children, and adults, with symptoms ranging from mild fever to incapacitating high fever, with severe headache, pain behind the eyes, muscle and joint pain, and rash.

Dengue is a self-limiting febrile illness with symptoms ranging from extremely mild (asymptomatic) to severe. Symptoms of dengue may be observed around 4–10 days after the bite of an infected mosquito.

Every month ECDC provides detailed epidemiological overview of the worldwide transmission of dengue in its weekly threat report (Communicable Diseases Threat Report).

Mild symptoms of dengue can be confused with other illnesses that cause fever. Symptoms of dengue typically last 2–7 days. Most people will recover after about a week.

Dengue, caused by four closely related viruses, is a growing global public health concern, with outbreaks capable of overwhelming health-care systems and disrupting economies.

Mild dengue fever causes a high fever and flu-like symptoms. A more serious form of dengue fever, called dengue hemorrhagic fever, can cause bleeding, a sudden drop in blood pressure and death.

Dengue fever (DF) is caused by the dengue virus (DENV), a member of the Flaviviridae family and the most common arthropod-borne viral disease in humans. Humans are primarily infected with four DENV serotypes (DENV 1–4) through the Aedes aegypti mosquito.