Data Source For Areas Affected
The maps designate countries considered to be affected by a disease. Areas within countries may or may not be affected by a specific disease. Consult with a Travel Healthcare Provider or www.cdc.gov/travel about your specific itinerary prior to travel.
Reporting activity data are provided by Sitata and derived from numerous sources, including official surveillance data and news reports. Reporting activity does not reflect current risk of infection with a disease. Not all areas report cases of disease; therefore, the absence of activity on the map does not indicate that a disease is not present. The relationship between the intensity of reporting activity and actual disease transmission is unknown and does not indicate a difference in risk. Maps do not reflect differential distribution of diseases within a country.
Dengue is a viral disease spread by mosquitos.
Dengue affects as many as 390 million people globally every year and can cause severe, life-threatening illness. It occurs in warm, humid environments throughout the Americas, Africa, Asia, the Pacific Islands, and parts of Australia. Unlike malaria or Japanese encephalitis, dengue is more common in urban and suburban areas where conditions are suitable for the mosquito. There are four different viruses that cause dengue, all transmitted by the same mosquitos.
Dengue is spread by mosquitos.
A single encounter with an infected mosquito is all that is needed to become sick with dengue. The mosquito that spreads dengue prefers to live in and around human residences in urbanized areas, and it bites throughout the day.
Any traveler to a dengue-affected area has a chance of being infected.
In some places, dengue is seasonal, but, in others, transmission occurs year-round. Travelers to high-altitude destinations may not have to worry about dengue, unless they pass through low-lying areas.
Dengue can be severe. Those likely to develop a severe form of the disease include the elderly and those with pre-existing chronic conditions.
Dengue is very similar to Zika and chikungunya.
Symptoms of dengue include:
The severity of illness varies from a very mild infection to a severe, hemorrhagic disease that can be fatal. Severe symptoms may begin after the illness has appeared to improve and include:
In most cases, symptoms last five to seven days. Fatigue and depression may persist for weeks after the illness.
Talk to a healthcare provider about how to avoid mosquito bites by the mosquitos that transmit dengue, Zika, and chikungunya.
Some options include:
In May of 2019, the U.S. Food and Drug Administration approved a vaccine for dengue disease in children aged 9–16 and living in an area where dengue is common and who have had previous, laboratory-confirmed dengue infection. However, there is no vaccine available for adult travelers, so precautions focus on avoiding mosquito bites.
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This Site Does Not Provide Medical Advice. The content is intended for informational purposes only and should not be used to replace a discussion with a healthcare or travel health professional. Always seek the advice of your doctor with any questions you may have about your health. The content on this site has been created for U.S. residents only.
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