Skip to main content


Medically reviewed by Last updated on Jul 7, 2024.

What is dengue?

Dengue is a disease caused by 4 different viruses. Infection by one virus does not provide immunity against the other 3. This means you can get dengue up to 4 times. A dengue virus may cause a mild to severe infection.

What are the signs and symptoms of dengue?

You may not have symptoms. Any of the following may develop 4 to 10 days after infection, usually lasting up to 7 days:

How is dengue diagnosed and treated?

Your healthcare provider will examine you and ask about your symptoms. Tell him or her if you have recently traveled. You will need blood tests to check for infection and measure your blood cell levels. Dengue cannot be cured. You may need the following:

What can I do to manage dengue?

What do I need to know about the dengue vaccine?

A vaccine to protect against a dengue virus infection is not generally recommended currently. The vaccine is only recommended for children 9 through 16 years old who live in an area where dengue is common. A past dengue virus infection must be confirmed before the vaccine will be given. The vaccine is given as a shot in 3 doses, each 6 months apart. It can be given with other vaccines.

How is a dengue virus spread?

A dengue virus is most commonly spread to a human through the bite of an infected mosquito. Mosquitoes are usually found near water. Examples include ponds, buckets of water, animal dishes, and flower pots. The number of infected mosquitos may increase during rainy or humid seasons. A dengue virus may be passed from a mother to her unborn baby.

How can I help prevent the spread of dengue viruses?

Do not travel to areas where a dengue virus is common. Ask your healthcare provider where it is safe to travel. Prevent mosquito bites to decrease the risk that you will spread or get a dengue virus infection:

Call your local emergency number (911 in the US) or have someone call if:

When should I seek immediate care?

The following are warning signs that your infection is getting worse:

When should I call my doctor?

Care Agreement

You have the right to help plan your care. Learn about your health condition and how it may be treated. Discuss treatment options with your healthcare providers to decide what care you want to receive. You always have the right to refuse treatment. The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

© Copyright Merative 2024 Information is for End User's use only and may not be sold, redistributed or otherwise used for commercial purposes.

Learn more about Dengue

Treatment options

Care guides

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.