Dengue virus spreads through female mosquitoes, mainly Aedes aegypti and Aedes albopictus, which also cause yellow fever. It is more likely to widespread in warmer and humid areas.
Around 1/4 people infected with dengue get flu-like illness, which typically lasts for a week several days after the bite from an infected mosquito.
Around 1/20 people infected with dengue get severe symptoms, such as shock and internal bleeding, especially those who have had dengue in the past, infants and pregnant women. Severe dengue has a higher risk of death without proper medical care.
Dengue patients should avoid getting another mosquito bites during the first week of sickness since the virus may be in the blood and may be transmitted to new uninfected mosquitoes that could infect other people.
Vaccination and treatment
The first dengue vaccine has been invented.
There is no specific treatment for dengue fever, and medical care at a hospital should be taken for a sever illness.